# 2018 IMSA SportsCar Championship

The 2018 IMSA SportsCar Championship (known for sponsorship reasons as the 2018 IMSA WeatherTech SportsCar Championship) was the 48th motor racing championship sanctioned by the International Motor Sports Association (IMSA) (which traces its lineage to the 1971 IMSA GT Championship). It was the fifth season of the United SportsCar Championship and third to be held under the name as the IMSA SportsCar Championship. It began on January 27 with the 24 Hours of Daytona, and ended on October 13 with the Petit Le Mans.

## Series News

* 2018 was the final season Fox Sports televised the series, NBC Sports Group becomes the series' broadcaster, starting in 2019.
* 2018 was also the final season Continental Tire provided tires for competitors.

## Classes

* Prototype (P) (DPi and LMP2)
* GT Le Mans (GTLM)
* GT Daytona (GTD)
At the end of 2017 season, the Prototype Challenge (PC) class was reduced to a support series.

## Schedule
### Race schedule

The 2018 schedule was released on August 4, 2017 and featured twelve rounds.
| Rnd. | Race | Length | Classes | Circuit | Location | Date |
| 1 | Rolex 24 at Daytona | 24 hours | All | Daytona International Speedway | Daytona Beach, Florida | January 27–28 |
| 2 | Mobil 1 Twelve Hours of Sebring | 12 hours | All | Sebring International Raceway | Sebring, Florida | March 17 |
| 3 | BUBBA Burger Sports Car Grand Prix at Long Beach | 1 hour 40 minutes | P, GTLM | Long Beach Street Circuit | Long Beach, California | April 14 |
| 4 | Acura Sports Car Challenge at Mid-Ohio | 2 hours 40 minutes | All | Mid-Ohio Sports Car Course | Lexington, Ohio | May 6 |
| 5 | Chevrolet Detroit Grand Prix | 1 hour 40 minutes | P, GTD | The Raceway on Belle Isle | Detroit, Michigan | June 2 |
| 6 | Sahlen's Six Hours of The Glen | 6 hours | All | Watkins Glen International | Watkins Glen, New York | July 1 |
| 7 | Mobil 1 SportsCar Grand Prix | 2 hours 40 minutes | All | Canadian Tire Motorsport Park | Bowmanville, Ontario | July 8 |
| 8 | Northeast Grand Prix | 2 hours 40 minutes | GTLM, GTD | Lime Rock Park | Lakeville, Connecticut | July 21 |
| 9 | Continental Tire Road Race Showcase | 2 hours 40 minutes | All | Road America | Elkhart Lake, Wisconsin | August 5 |
| 10 | Michelin GT Challenge at VIR | 2 hours 40 minutes | GTLM, GTD | Virginia International Raceway | Alton, Virginia | August 19 |
| 11 | Continental Tire Monterey Grand Prix | 2 hours 40 minutes | All | WeatherTech Raceway Laguna Seca | Monterey, California | September 9 |
| 12 | Motul Petit Le Mans | 10 hours | All | Road Atlanta | Braselton, Georgia | October 13 |

### Calendar changes

* The Circuit of the Americas was removed from the calendar, and replaced by a round at Mid-Ohio Sports Car Course.
* The GTD was removed from Long Beach due to space limitations.
* A non-championship round was held at Sebring in November 2018 with IMSA's 2019 rules for the GTD class, along with LMP3, GS, and TCR classes in the secondary series. This saw Michelin's debut as the 2019 series specification tire supplier.

## Entries
### Prototype

The Prototype class is made up of LMP2 cars both in LMP2 trim, with the ACO specification Gibson V8 engine, and in Daytona Prototype international (DPi) trim, where manufacturers are allowed to use their own engines and bodykits, designed to reflect the automaker's design language. Acura (Oreca), Mazda (Riley Technologies), Cadillac (Dallara), and Nissan (Onroak Automotive) run chassis from the respective constructors featuring manufacturer-specific bodywork and engines.
| Team | Chassis | Engine | No. | Drivers | Rounds |
| Tequila Patrón ESM | Nissan Onroak DPi | Nissan VR38DETT 3.8 L Turbo V6 | 2 | Ryan Dalziel | 1–6, 9, 11–12 |
| Tequila Patrón ESM | Nissan Onroak DPi | Nissan VR38DETT 3.8 L Turbo V6 | 2 | Scott Sharp | 1–6, 9, 11–12 |
| Tequila Patrón ESM | Nissan Onroak DPi | Nissan VR38DETT 3.8 L Turbo V6 | 2 | Olivier Pla | 1–2, 6 |
| Tequila Patrón ESM | Nissan Onroak DPi | Nissan VR38DETT 3.8 L Turbo V6 | 2 | Norman Nato | 12 |
| Tequila Patrón ESM | Nissan Onroak DPi | Nissan VR38DETT 3.8 L Turbo V6 | 22 | Pipo Derani | All |
| Tequila Patrón ESM | Nissan Onroak DPi | Nissan VR38DETT 3.8 L Turbo V6 | 22 | Johannes van Overbeek | 1–6, 9, 11–12 |
| Tequila Patrón ESM | Nissan Onroak DPi | Nissan VR38DETT 3.8 L Turbo V6 | 22 | Nicolas Lapierre | 1–2, 6 |
| Tequila Patrón ESM | Nissan Onroak DPi | Nissan VR38DETT 3.8 L Turbo V6 | 22 | Ryan Dalziel | 7 |
| Tequila Patrón ESM | Nissan Onroak DPi | Nissan VR38DETT 3.8 L Turbo V6 | 22 | Timo Bernhard | 12 |
| Mustang Sampling Racing Whelen Engineering Racing | Cadillac DPi-V.R | Cadillac 5.5 L V8 | 5 | Filipe Albuquerque | All |
| Mustang Sampling Racing Whelen Engineering Racing | Cadillac DPi-V.R | Cadillac 5.5 L V8 | 5 | João Barbosa | 1–5, 9, 11 |
| Mustang Sampling Racing Whelen Engineering Racing | Cadillac DPi-V.R | Cadillac 5.5 L V8 | 5 | Christian Fittipaldi | 1–2, 6–7, 12 |
| Mustang Sampling Racing Whelen Engineering Racing | Cadillac DPi-V.R | Cadillac 5.5 L V8 | 5 | Gabby Chaves | 6 |
| Mustang Sampling Racing Whelen Engineering Racing | Cadillac DPi-V.R | Cadillac 5.5 L V8 | 5 | Tristan Vautier | 12 |
| Mustang Sampling Racing Whelen Engineering Racing | Cadillac DPi-V.R | Cadillac 5.5 L V8 | 31 | Eric Curran | All |
| Mustang Sampling Racing Whelen Engineering Racing | Cadillac DPi-V.R | Cadillac 5.5 L V8 | 31 | Felipe Nasr | All |
| Mustang Sampling Racing Whelen Engineering Racing | Cadillac DPi-V.R | Cadillac 5.5 L V8 | 31 | Mike Conway | 1–2, 6 |
| Mustang Sampling Racing Whelen Engineering Racing | Cadillac DPi-V.R | Cadillac 5.5 L V8 | 31 | Stuart Middleton | 1 |
| Mustang Sampling Racing Whelen Engineering Racing | Cadillac DPi-V.R | Cadillac 5.5 L V8 | 31 | Gabby Chaves | 12 |
| Acura Team Penske | Acura ARX-05 | Acura AR35TT 3.5 L Turbo V6 | 6 | Dane Cameron | All |
| Acura Team Penske | Acura ARX-05 | Acura AR35TT 3.5 L Turbo V6 | 6 | Juan Pablo Montoya | All |
| Acura Team Penske | Acura ARX-05 | Acura AR35TT 3.5 L Turbo V6 | 6 | Simon Pagenaud | 1–2, 12 |
| Acura Team Penske | Acura ARX-05 | Acura AR35TT 3.5 L Turbo V6 | 7 | Hélio Castroneves | All |
| Acura Team Penske | Acura ARX-05 | Acura AR35TT 3.5 L Turbo V6 | 7 | Ricky Taylor | All |
| Acura Team Penske | Acura ARX-05 | Acura AR35TT 3.5 L Turbo V6 | 7 | Graham Rahal | 1–2, 12 |
| Wayne Taylor Racing | Cadillac DPi-V.R | Cadillac 5.5 L V8 | 10 | Jordan Taylor | All |
| Wayne Taylor Racing | Cadillac DPi-V.R | Cadillac 5.5 L V8 | 10 | Renger van der Zande | All |
| Wayne Taylor Racing | Cadillac DPi-V.R | Cadillac 5.5 L V8 | 10 | Ryan Hunter-Reay | 1–2, 12 |
| BAR1 Motorsports | Riley Mk. 30 | Gibson GK428 4.2 L V8 | 20 | Marc Drumwright | 1 |
| BAR1 Motorsports | Riley Mk. 30 | Gibson GK428 4.2 L V8 | 20 | Brendan Gaughan | 1 |
| BAR1 Motorsports | Riley Mk. 30 | Gibson GK428 4.2 L V8 | 20 | Eric Lux | 1 |
| BAR1 Motorsports | Riley Mk. 30 | Gibson GK428 4.2 L V8 | 20 | Alex Popow | 1 |
| United Autosports | Ligier JS P217 | Gibson GK428 4.2 L V8 | 23 | Fernando Alonso | 1 |
| United Autosports | Ligier JS P217 | Gibson GK428 4.2 L V8 | 23 | Phil Hanson | 1 |
| United Autosports | Ligier JS P217 | Gibson GK428 4.2 L V8 | 23 | Lando Norris | 1 |
| United Autosports | Ligier JS P217 | Gibson GK428 4.2 L V8 | 32 | Paul di Resta | 1–2, 6 |
| United Autosports | Ligier JS P217 | Gibson GK428 4.2 L V8 | 32 | Bruno Senna | 1, 6 |
| United Autosports | Ligier JS P217 | Gibson GK428 4.2 L V8 | 32 | Will Owen | 1 |
| United Autosports | Ligier JS P217 | Gibson GK428 4.2 L V8 | 32 | Hugo de Sadeleer | 1 |
| United Autosports | Ligier JS P217 | Gibson GK428 4.2 L V8 | 32 | Phil Hanson | 2, 6 |
| United Autosports | Ligier JS P217 | Gibson GK428 4.2 L V8 | 32 | Alex Brundle | 2 |
| Jackie Chan DCR JOTA | Oreca 07 | Gibson GK428 4.2 L V8 | 37 | Robin Frijns | 1 |
| Jackie Chan DCR JOTA | Oreca 07 | Gibson GK428 4.2 L V8 | 37 | Daniel Juncadella | 1 |
| Jackie Chan DCR JOTA | Oreca 07 | Gibson GK428 4.2 L V8 | 37 | Felix Rosenqvist | 1 |
| Jackie Chan DCR JOTA | Oreca 07 | Gibson GK428 4.2 L V8 | 37 | Lance Stroll | 1 |
| Jackie Chan DCR JOTA | Oreca 07 | Gibson GK428 4.2 L V8 | 78 | Alex Brundle | 1 |
| Jackie Chan DCR JOTA | Oreca 07 | Gibson GK428 4.2 L V8 | 78 | António Félix da Costa | 1 |
| Jackie Chan DCR JOTA | Oreca 07 | Gibson GK428 4.2 L V8 | 78 | Ferdinand Habsburg-Lothringen | 1 |
| Jackie Chan DCR JOTA | Oreca 07 | Gibson GK428 4.2 L V8 | 78 | Ho-Pin Tung | 1 |
| Performance Tech Motorsports | Oreca 07 | Gibson GK428 4.2 L V8 | 38 | James French | 1–4, 6–7, 12 |
| Performance Tech Motorsports | Oreca 07 | Gibson GK428 4.2 L V8 | 38 | Kyle Masson | 1–4, 6–7, 12 |
| Performance Tech Motorsports | Oreca 07 | Gibson GK428 4.2 L V8 | 38 | Patricio O'Ward | 1–2 |
| Performance Tech Motorsports | Oreca 07 | Gibson GK428 4.2 L V8 | 38 | Joel Miller | 1, 6 |
| Performance Tech Motorsports | Oreca 07 | Gibson GK428 4.2 L V8 | 38 | Nicholas Boulle | 12 |
| AFS/PR1 Mathiasen Motorsports | Ligier JS P217 Oreca 07 | Gibson GK428 4.2 L V8 | 52 | Sebastián Saavedra | All |
| AFS/PR1 Mathiasen Motorsports | Ligier JS P217 Oreca 07 | Gibson GK428 4.2 L V8 | 52 | Gustavo Yacamán | 1–7, 9, 11 |
| AFS/PR1 Mathiasen Motorsports | Ligier JS P217 Oreca 07 | Gibson GK428 4.2 L V8 | 52 | Roberto González | 1–2 |
| AFS/PR1 Mathiasen Motorsports | Ligier JS P217 Oreca 07 | Gibson GK428 4.2 L V8 | 52 | Nicholas Boulle | 1 |
| AFS/PR1 Mathiasen Motorsports | Ligier JS P217 Oreca 07 | Gibson GK428 4.2 L V8 | 52 | Will Owen | 6, 12 |
| AFS/PR1 Mathiasen Motorsports | Ligier JS P217 Oreca 07 | Gibson GK428 4.2 L V8 | 52 | José Gutiérrez | 12 |
| CORE Autosport | Oreca 07 | Gibson GK428 4.2 L V8 | 54 | Jon Bennett | All |
| CORE Autosport | Oreca 07 | Gibson GK428 4.2 L V8 | 54 | Colin Braun | All |
| CORE Autosport | Oreca 07 | Gibson GK428 4.2 L V8 | 54 | Romain Dumas | 1–2, 6, 12 |
| CORE Autosport | Oreca 07 | Gibson GK428 4.2 L V8 | 54 | Loïc Duval | 1 |
| Mazda Team Joest | Mazda RT24-P | Mazda MZ-2.0T 2.0 L Turbo I4 | 55 | Jonathan Bomarito | All |
| Mazda Team Joest | Mazda RT24-P | Mazda MZ-2.0T 2.0 L Turbo I4 | 55 | Harry Tincknell | 1–3, 5–7, 9, 11 |
| Mazda Team Joest | Mazda RT24-P | Mazda MZ-2.0T 2.0 L Turbo I4 | 55 | Spencer Pigot | 1–2, 4, 6, 12 |
| Mazda Team Joest | Mazda RT24-P | Mazda MZ-2.0T 2.0 L Turbo I4 | 55 | Marino Franchitti | 12 |
| Mazda Team Joest | Mazda RT24-P | Mazda MZ-2.0T 2.0 L Turbo I4 | 77 | Oliver Jarvis | All |
| Mazda Team Joest | Mazda RT24-P | Mazda MZ-2.0T 2.0 L Turbo I4 | 77 | Tristan Nunez | All |
| Mazda Team Joest | Mazda RT24-P | Mazda MZ-2.0T 2.0 L Turbo I4 | 77 | René Rast | 1–2, 6 |
| Mazda Team Joest | Mazda RT24-P | Mazda MZ-2.0T 2.0 L Turbo I4 | 77 | Lucas di Grassi | 12 |
| JDC-Miller MotorSports | Oreca 07 | Gibson GK428 4.2 L V8 | 85 | Robert Alon | All |
| JDC-Miller MotorSports | Oreca 07 | Gibson GK428 4.2 L V8 | 85 | Simon Trummer | All |
| JDC-Miller MotorSports | Oreca 07 | Gibson GK428 4.2 L V8 | 85 | Austin Cindric | 1 |
| JDC-Miller MotorSports | Oreca 07 | Gibson GK428 4.2 L V8 | 85 | Devlin DeFrancesco | 1, 12 |
| JDC-Miller MotorSports | Oreca 07 | Gibson GK428 4.2 L V8 | 85 | Nelson Panciatici | 2, 6 |
| JDC-Miller MotorSports | Oreca 07 | Gibson GK428 4.2 L V8 | 99 | Mikhail Goikhberg | All |
| JDC-Miller MotorSports | Oreca 07 | Gibson GK428 4.2 L V8 | 99 | Stephen Simpson | All |
| JDC-Miller MotorSports | Oreca 07 | Gibson GK428 4.2 L V8 | 99 | Chris Miller | 1–2, 6, 12 |
| JDC-Miller MotorSports | Oreca 07 | Gibson GK428 4.2 L V8 | 99 | Gustavo Menezes | 1 |
| Spirit of Daytona Racing | Cadillac DPi-V.R | Cadillac 5.5 L V8 | 90 | Matt McMurry | 1–2, 5–6 |
| Spirit of Daytona Racing | Cadillac DPi-V.R | Cadillac 5.5 L V8 | 90 | Tristan Vautier | 1–2, 5–6 |
| Spirit of Daytona Racing | Cadillac DPi-V.R | Cadillac 5.5 L V8 | 90 | Eddie Cheever III | 1–2 |

### GT Le Mans

| Team | Chassis | Engine | No. | Drivers | Rounds |
| Corvette Racing | Chevrolet Corvette C7.R | Chevrolet LT5.5 5.5 L V8 | 3 | Antonio García | All |
| Corvette Racing | Chevrolet Corvette C7.R | Chevrolet LT5.5 5.5 L V8 | 3 | Jan Magnussen | All |
| Corvette Racing | Chevrolet Corvette C7.R | Chevrolet LT5.5 5.5 L V8 | 3 | Mike Rockenfeller | 1–2 |
| Corvette Racing | Chevrolet Corvette C7.R | Chevrolet LT5.5 5.5 L V8 | 3 | Marcel Fässler | 12 |
| Corvette Racing | Chevrolet Corvette C7.R | Chevrolet LT5.5 5.5 L V8 | 4 | Oliver Gavin | All |
| Corvette Racing | Chevrolet Corvette C7.R | Chevrolet LT5.5 5.5 L V8 | 4 | Tommy Milner | All |
| Corvette Racing | Chevrolet Corvette C7.R | Chevrolet LT5.5 5.5 L V8 | 4 | Marcel Fässler | 1–2, 12 |
| BMW Team RLL | BMW M8 GTE | BMW S63 4.0 L Twin-turbo V8 | 24 | John Edwards | All |
| BMW Team RLL | BMW M8 GTE | BMW S63 4.0 L Twin-turbo V8 | 24 | Jesse Krohn | All |
| BMW Team RLL | BMW M8 GTE | BMW S63 4.0 L Twin-turbo V8 | 24 | Nick Catsburg | 1–2 |
| BMW Team RLL | BMW M8 GTE | BMW S63 4.0 L Twin-turbo V8 | 24 | Augusto Farfus | 1 |
| BMW Team RLL | BMW M8 GTE | BMW S63 4.0 L Twin-turbo V8 | 24 | Tom Blomqvist | 6 |
| BMW Team RLL | BMW M8 GTE | BMW S63 4.0 L Twin-turbo V8 | 24 | Chaz Mostert | 12 |
| BMW Team RLL | BMW M8 GTE | BMW S63 4.0 L Twin-turbo V8 | 25 | Connor De Phillippi | All |
| BMW Team RLL | BMW M8 GTE | BMW S63 4.0 L Twin-turbo V8 | 25 | Alexander Sims | All |
| BMW Team RLL | BMW M8 GTE | BMW S63 4.0 L Twin-turbo V8 | 25 | Bill Auberlen | 1–2, 6, 12 |
| BMW Team RLL | BMW M8 GTE | BMW S63 4.0 L Twin-turbo V8 | 25 | Philipp Eng | 1 |
| Risi Competizione | Ferrari 488 GTE | Ferrari F154CB 3.9 L Turbo V8 | 62 | Toni Vilander | 1–2, 12 |
| Risi Competizione | Ferrari 488 GTE | Ferrari F154CB 3.9 L Turbo V8 | 62 | James Calado | 1–2 |
| Risi Competizione | Ferrari 488 GTE | Ferrari F154CB 3.9 L Turbo V8 | 62 | Alessandro Pier Guidi | 1–2 |
| Risi Competizione | Ferrari 488 GTE | Ferrari F154CB 3.9 L Turbo V8 | 62 | Davide Rigon | 1 |
| Risi Competizione | Ferrari 488 GTE | Ferrari F154CB 3.9 L Turbo V8 | 62 | Andrea Bertolini | 12 |
| Risi Competizione | Ferrari 488 GTE | Ferrari F154CB 3.9 L Turbo V8 | 62 | Miguel Molina | 12 |
| Ford Chip Ganassi Racing | Ford GT | Ford EcoBoost 3.5 L Turbo V6 | 66 | Joey Hand | All |
| Ford Chip Ganassi Racing | Ford GT | Ford EcoBoost 3.5 L Turbo V6 | 66 | Dirk Müller | All |
| Ford Chip Ganassi Racing | Ford GT | Ford EcoBoost 3.5 L Turbo V6 | 66 | Sébastien Bourdais | 1–2, 12 |
| Ford Chip Ganassi Racing | Ford GT | Ford EcoBoost 3.5 L Turbo V6 | 67 | Ryan Briscoe | All |
| Ford Chip Ganassi Racing | Ford GT | Ford EcoBoost 3.5 L Turbo V6 | 67 | Richard Westbrook | All |
| Ford Chip Ganassi Racing | Ford GT | Ford EcoBoost 3.5 L Turbo V6 | 67 | Scott Dixon | 1–2, 12 |
| Porsche GT Team | Porsche 911 RSR | Porsche 4.0 L Flat-6 | 911 | Patrick Pilet | All |
| Porsche GT Team | Porsche 911 RSR | Porsche 4.0 L Flat-6 | 911 | Nick Tandy | All |
| Porsche GT Team | Porsche 911 RSR | Porsche 4.0 L Flat-6 | 911 | Frédéric Makowiecki | 1–2, 12 |
| Porsche GT Team | Porsche 911 RSR | Porsche 4.0 L Flat-6 | 912 | Earl Bamber | All |
| Porsche GT Team | Porsche 911 RSR | Porsche 4.0 L Flat-6 | 912 | Laurens Vanthoor | All |
| Porsche GT Team | Porsche 911 RSR | Porsche 4.0 L Flat-6 | 912 | Gianmaria Bruni | 1–2 |
| Porsche GT Team | Porsche 911 RSR | Porsche 4.0 L Flat-6 | 912 | Mathieu Jaminet | 12 |

### GT Daytona

| Team | Chassis | Engine | No. | Drivers | Rounds |
| GRT Grasser Racing Team | Lamborghini Huracán GT3 | Lamborghini 5.2 L V10 | 11 | Mirko Bortolotti | 1 |
| GRT Grasser Racing Team | Lamborghini Huracán GT3 | Lamborghini 5.2 L V10 | 11 | Rik Breukers | 1 |
| GRT Grasser Racing Team | Lamborghini Huracán GT3 | Lamborghini 5.2 L V10 | 11 | Rolf Ineichen | 1 |
| GRT Grasser Racing Team | Lamborghini Huracán GT3 | Lamborghini 5.2 L V10 | 11 | Franck Perera | 1 |
| GRT Grasser Racing Team | Lamborghini Huracán GT3 | Lamborghini 5.2 L V10 | 19 | Christian Engelhart | 1 |
| GRT Grasser Racing Team | Lamborghini Huracán GT3 | Lamborghini 5.2 L V10 | 19 | Christoph Lenz | 1 |
| GRT Grasser Racing Team | Lamborghini Huracán GT3 | Lamborghini 5.2 L V10 | 19 | Louis Machiels | 1 |
| GRT Grasser Racing Team | Lamborghini Huracán GT3 | Lamborghini 5.2 L V10 | 19 | Ezequiel Pérez Companc | 1 |
| GRT Grasser Racing Team | Lamborghini Huracán GT3 | Lamborghini 5.2 L V10 | 19 | Max van Splunteren | 1 |
| 3GT Racing | Lexus RC F GT3 | Lexus 5.0 L V8 | 14 | Dominik Baumann | All |
| 3GT Racing | Lexus RC F GT3 | Lexus 5.0 L V8 | 14 | Kyle Marcelli | All |
| 3GT Racing | Lexus RC F GT3 | Lexus 5.0 L V8 | 14 | Philipp Frommenwiler | 1–2, 12 |
| 3GT Racing | Lexus RC F GT3 | Lexus 5.0 L V8 | 14 | Bruno Junqueira | 1 |
| 3GT Racing | Lexus RC F GT3 | Lexus 5.0 L V8 | 15 | Jack Hawksworth | All |
| 3GT Racing | Lexus RC F GT3 | Lexus 5.0 L V8 | 15 | David Heinemeier Hansson | 1–2, 4–7, 9–12 |
| 3GT Racing | Lexus RC F GT3 | Lexus 5.0 L V8 | 15 | Dominik Farnbacher | 1 |
| 3GT Racing | Lexus RC F GT3 | Lexus 5.0 L V8 | 15 | Scott Pruett | 1 |
| 3GT Racing | Lexus RC F GT3 | Lexus 5.0 L V8 | 15 | Sean Rayhall | 2, 12 |
| 3GT Racing | Lexus RC F GT3 | Lexus 5.0 L V8 | 15 | Mario Farnbacher | 6, 8 |
| Wright Motorsports | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 16 | Wolf Henzler | 4–5, 7 |
| Wright Motorsports | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 16 | Michael Schein | 4–5, 7 |
| Wright Motorsports | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 58 | Patrick Long | All |
| Wright Motorsports | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 58 | Christina Nielsen | All |
| Wright Motorsports | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 58 | Robert Renauer | 1–2, 6, 12 |
| Wright Motorsports | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 58 | Mathieu Jaminet | 1–2 |
| Montaplast by Land-Motorsport | Audi R8 LMS | Audi 5.2 L V10 | 29 | Sheldon van der Linde | 1–2, 6, 12 |
| Montaplast by Land-Motorsport | Audi R8 LMS | Audi 5.2 L V10 | 29 | Christopher Mies | 1–2, 6, 12 |
| Montaplast by Land-Motorsport | Audi R8 LMS | Audi 5.2 L V10 | 29 | Kelvin van der Linde | 1 |
| Montaplast by Land-Motorsport | Audi R8 LMS | Audi 5.2 L V10 | 29 | Jeffrey Schmidt | 1 |
| Montaplast by Land-Motorsport | Audi R8 LMS | Audi 5.2 L V10 | 29 | Alessio Picariello | 2 |
| Montaplast by Land-Motorsport | Audi R8 LMS | Audi 5.2 L V10 | 29 | Daniel Morad | 12 |
| Mercedes-AMG Team Riley Motorsports SunEnergy1 Racing | Mercedes-AMG GT3 | Mercedes-AMG M159 6.2 L V8 | 33 | Jeroen Bleekemolen | All |
| Mercedes-AMG Team Riley Motorsports SunEnergy1 Racing | Mercedes-AMG GT3 | Mercedes-AMG M159 6.2 L V8 | 33 | Ben Keating | All |
| Mercedes-AMG Team Riley Motorsports SunEnergy1 Racing | Mercedes-AMG GT3 | Mercedes-AMG M159 6.2 L V8 | 33 | Luca Stolz | 1–2, 6, 12 |
| Mercedes-AMG Team Riley Motorsports SunEnergy1 Racing | Mercedes-AMG GT3 | Mercedes-AMG M159 6.2 L V8 | 33 | Adam Christodoulou | 1 |
| Mercedes-AMG Team Riley Motorsports SunEnergy1 Racing | Mercedes-AMG GT3 | Mercedes-AMG M159 6.2 L V8 | 75 | Kenny Habul | 1–2, 4–6 |
| Mercedes-AMG Team Riley Motorsports SunEnergy1 Racing | Mercedes-AMG GT3 | Mercedes-AMG M159 6.2 L V8 | 75 | Mikaël Grenier | 1–2, 6 |
| Mercedes-AMG Team Riley Motorsports SunEnergy1 Racing | Mercedes-AMG GT3 | Mercedes-AMG M159 6.2 L V8 | 75 | Thomas Jäger | 1–2, 6 |
| Mercedes-AMG Team Riley Motorsports SunEnergy1 Racing | Mercedes-AMG GT3 | Mercedes-AMG M159 6.2 L V8 | 75 | Maro Engel | 1, 4 |
| Mercedes-AMG Team Riley Motorsports SunEnergy1 Racing | Mercedes-AMG GT3 | Mercedes-AMG M159 6.2 L V8 | 75 | Bernd Schneider | 5 |
| CJ Wilson Racing | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 36 | Till Bechtolsheimer | 2, 6 |
| CJ Wilson Racing | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 36 | Marc Miller | 2, 6 |
| CJ Wilson Racing | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 36 | Kuno Wittmer | 2 |
| Magnus Racing | Audi R8 LMS | Audi 5.2 L V10 | 44 | Andy Lally | All |
| Magnus Racing | Audi R8 LMS | Audi 5.2 L V10 | 44 | John Potter | All |
| Magnus Racing | Audi R8 LMS | Audi 5.2 L V10 | 44 | Andrew Davis | 1–2, 6, 12 |
| Magnus Racing | Audi R8 LMS | Audi 5.2 L V10 | 44 | Markus Winkelhock | 1 |
| Paul Miller Racing | Lamborghini Huracán GT3 | Lamborghini 5.2 L V10 | 48 | Bryan Sellers | All |
| Paul Miller Racing | Lamborghini Huracán GT3 | Lamborghini 5.2 L V10 | 48 | Madison Snow | All |
| Paul Miller Racing | Lamborghini Huracán GT3 | Lamborghini 5.2 L V10 | 48 | Andrea Caldarelli | 1 |
| Paul Miller Racing | Lamborghini Huracán GT3 | Lamborghini 5.2 L V10 | 48 | Bryce Miller | 1 |
| Paul Miller Racing | Lamborghini Huracán GT3 | Lamborghini 5.2 L V10 | 48 | Corey Lewis | 2, 12 |
| Squadra Corse Garage Italia | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 51 | Daniel Serra | 1–2, 6 |
| Squadra Corse Garage Italia | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 51 | Paul Dalla Lana | 1–2 |
| Squadra Corse Garage Italia | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 51 | Pedro Lamy | 1–2 |
| Squadra Corse Garage Italia | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 51 | Mathias Lauda | 1–2 |
| Squadra Corse Garage Italia | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 51 | Oswaldo Negri Jr. | 6, 9, 11 |
| Squadra Corse Garage Italia | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 51 | Francesco Piovanetti | 6, 9, 11 |
| Manthey Racing | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 59 | Matteo Cairoli | 1 |
| Manthey Racing | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 59 | Sven Müller | 1 |
| Manthey Racing | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 59 | Harald Proczyk | 1 |
| Manthey Racing | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 59 | Steve Smith | 1 |
| Manthey Racing | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 59 | Randy Walls | 1 |
| Scuderia Corsa | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 63 | Cooper MacNeil | All |
| Scuderia Corsa | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 63 | Alessandro Balzan | 1–2, 4 |
| Scuderia Corsa | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 63 | Gunnar Jeannette | 1–2, 6, 8, 10–12 |
| Scuderia Corsa | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 63 | Jeff Segal | 1, 5–7 |
| Scuderia Corsa | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 63 | Alessandro Pier Guidi | 9 |
| Scuderia Corsa | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 63 | Daniel Serra | 12 |
| Scuderia Corsa | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 64 | Townsend Bell | 1–2, 6, 11–12 |
| Scuderia Corsa | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 64 | Frankie Montecalvo | 1–2, 6, 11–12 |
| Scuderia Corsa | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 64 | Bill Sweedler | 1–2, 6 |
| Scuderia Corsa | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 64 | Sam Bird | 1 |
| Scuderia Corsa | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 64 | Matteo Cressoni | 12 |
| HART | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 69 | Ryan Eversley | 1–2, 6 |
| HART | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 69 | Chad Gilsinger | 1–2, 6 |
| HART | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 69 | John Falb | 1 |
| HART | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 69 | Sean Rayhall | 1 |
| HART | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 69 | Tom Dyer | 2, 6 |
| P1 Motorsports | Mercedes-AMG GT3 | Mercedes-AMG M159 6.2 L V8 | 71 | J. C. Perez | 1–2, 6, 12 |
| P1 Motorsports | Mercedes-AMG GT3 | Mercedes-AMG M159 6.2 L V8 | 71 | Loris Spinelli | 1–2, 6 |
| P1 Motorsports | Mercedes-AMG GT3 | Mercedes-AMG M159 6.2 L V8 | 71 | Kenton Koch | 1–2 |
| P1 Motorsports | Mercedes-AMG GT3 | Mercedes-AMG M159 6.2 L V8 | 71 | Robby Foley | 1 |
| P1 Motorsports | Mercedes-AMG GT3 | Mercedes-AMG M159 6.2 L V8 | 71 | Daniel Morad | 6 |
| P1 Motorsports | Mercedes-AMG GT3 | Mercedes-AMG M159 6.2 L V8 | 71 | Felipe Fraga | 12 |
| P1 Motorsports | Mercedes-AMG GT3 | Mercedes-AMG M159 6.2 L V8 | 71 | Maximilian Buhk | 12 |
| Park Place Motorsports | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 73 | Jörg Bergmeister | 1–2, 6, 9, 11 |
| Park Place Motorsports | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 73 | Patrick Lindsey | 1–2, 6, 9, 11 |
| Park Place Motorsports | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 73 | Tim Pappas | 1–2, 12 |
| Park Place Motorsports | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 73 | Norbert Siedler | 1 |
| Park Place Motorsports | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 73 | Spencer Pumpelly | 12 |
| Park Place Motorsports | Porsche 911 GT3 R | Porsche 4.0 L Flat-6 | 73 | Wolf Henzler | 12 |
| Risi Competizione | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 82 | Santiago Creel | 1 |
| Risi Competizione | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 82 | Martin Fuentes | 1 |
| Risi Competizione | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 82 | Matt Griffin | 1 |
| Risi Competizione | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 82 | Miguel Molina | 1 |
| Risi Competizione | Ferrari 488 GT3 | Ferrari F154CB 3.9 L Turbo V8 | 82 | Ricardo Pérez de Lara | 1 |
| Meyer Shank Racing with Curb-Agajanian | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 86 | Katherine Legge | All |
| Meyer Shank Racing with Curb-Agajanian | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 86 | Álvaro Parente | 1–2, 4, 6–9, 11–12 |
| Meyer Shank Racing with Curb-Agajanian | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 86 | Trent Hindman | 1–2, 12 |
| Meyer Shank Racing with Curb-Agajanian | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 86 | A. J. Allmendinger | 1 |
| Meyer Shank Racing with Curb-Agajanian | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 86 | Mario Farnbacher | 5, 10 |
| Meyer Shank Racing with Curb-Agajanian | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 93 | Justin Marks | All |
| Meyer Shank Racing with Curb-Agajanian | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 93 | Lawson Aschenbach | All |
| Meyer Shank Racing with Curb-Agajanian | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 93 | Mario Farnbacher | 1–2, 12 |
| Meyer Shank Racing with Curb-Agajanian | Acura NSX GT3 | Acura 3.5 L Turbo V6 | 93 | Côme Ledogar | 1 |
| Turner Motorsport | BMW M6 GT3 | BMW 4.4 L Turbo V8 | 96 | Don Yount | 1–2, 6, 12 |
| Turner Motorsport | BMW M6 GT3 | BMW 4.4 L Turbo V8 | 96 | Jens Klingmann | 1 |
| Turner Motorsport | BMW M6 GT3 | BMW 4.4 L Turbo V8 | 96 | Mark Kvamme | 1 |
| Turner Motorsport | BMW M6 GT3 | BMW 4.4 L Turbo V8 | 96 | Cameron Lawrence | 1 |
| Turner Motorsport | BMW M6 GT3 | BMW 4.4 L Turbo V8 | 96 | Martin Tomczyk | 1 |
| Turner Motorsport | BMW M6 GT3 | BMW 4.4 L Turbo V8 | 96 | Dillon Machavern | 2, 4, 6, 12 |
| Turner Motorsport | BMW M6 GT3 | BMW 4.4 L Turbo V8 | 96 | Markus Palttala | 2, 6, 9, 12 |
| Turner Motorsport | BMW M6 GT3 | BMW 4.4 L Turbo V8 | 96 | Bill Auberlen | 4–5, 7–8, 10–11 |
| Turner Motorsport | BMW M6 GT3 | BMW 4.4 L Turbo V8 | 96 | Robby Foley | 5, 7–11 |