The Avro Canada CF-100 Canuck (affectionately known as the "Clunk") was a Canadian jet interceptor/fighter serving during the Cold War both in NATO bases in Europe and as part of NORAD.
 The CF-100 was the only Canadian-designed fighter to enter mass production, serving primarily with the Royal Canadian Air Force and Canadian Armed Forces and also in small numbers in Belgium.
 For its day, the CF-100 featured a short takeoff run and high climb rate, making it well suited to its role as an interceptor.
Laville DI-4 (Russian: Лавиль ДИ-4 ) was a prototype two-seat fighter aircraft developed in the Soviet Union in the 1930s.
 The chief designer Henri Laville was one of several French aviation specialists invited to work in the Soviet Union and not surprisingly the DI-4 layout was typical of the French trend at the time with a high-mounted gull wing (first for a Soviet aircraft) and all-metal construction.
 Test flight program was completed in 1933 but despite good performance the aircraft did not enter mass production, in part because Soviet Union had no plans to purchase the Curtiss V-1570 engine.
SAI Ambrosini was an Italian aircraft manufacturer established in Passignano sul Trasimeno, Italy in 1922 as the Società Aeronautica Italiana.
 It became SAI Ambrosini when it was acquired by the Ambrosini group in 1934.
 Prior to World War II, the firm built a number of light touring and racing aircraft, the most successful of which was the SAI.7.
 During the war, this design served as the basis for some light fighter designs, but these did not enter mass production.
The Junkers J.I (manufacturer's designation J 4) was a German "J-class" armored sesquiplane of World War I, developed for low-level ground attack, observation and Army cooperation.
 It is especially noteworthy as being the first all-metal aircraft to enter mass production; the aircraft's metal construction and heavy armour was an effective shield against small arms fire over the battlefield.
The Ford Expedition is a fullsize SUV that is made by Ford Motor Company.
 Introduced for the 1997 model year as the successor of the Ford Bronco, the Expedition is the first full-size Ford SUV sold with a four-door body.
 For its entire production life, the Ford Expedition has been derived from the corresponding generation of the Ford F-150 in production, sharing body and mechanical components.
 Currently in its third model generation, a fourth-generation Ford Expedition is slated to enter production for the 2018 model year.
 Similar to the configuration of the Chevrolet Tahoe and Suburban, the Ford Expedition is sold in regular and extended lengths (the Ford Expedition EL/Max); sold since 2007, the latter functionally serves as the replacement for the Ford Excursion.
Grigorovich DI-3 (Russian: Григорович ДИ-3 ), ("Dvukhmyestnyi Istrebitel" - two-seat fighter), was a prototype two-seat fighter developed in the Soviet Union in the 1930s.
 It was intended to be a long-range escort fighter developed from the DI-2 with improved range and performance comparable to single-seat fighter aircraft of the time.
 DI-3 was a single-bay biplane of mixed construction with a twin-rudder tailplane of variable incidence.
 Although initial tests demonstrated flight characteristics comparable to Polikarpov I-5, the addition of armament and operational equipment caused significant degradation in performance and DI-3 did not enter mass production.
 The prototype was subsequently fitted with an enclosed cockpit and used as a VIP transport.
The Junkers J.1000 was an exercise in aeronautical design produced by the Junkers company of Germany in the mid-1920s.
 No airplane was ever produced.
 The design was led by Otto Mader who was also responsible for such Junkers aircraft as the J.1, which was the first all-metal aircraft to enter mass production.
The Ford Excursion is a heavy duty (Class 2), extended-length sport utility vehicle that was produced by Ford from 1999 to 2005 for the North American market.
 The longest and heaviest SUV ever to enter mass production, the Excursion was based upon the Ford F-250 Super Duty pickup truck.
 A ¾-ton chassis vehicle, the Ford Excursion was designed as a competitor for the 2500-series (also ¾-ton) Chevrolet Suburban and GMC Yukon XL.
The Dassault Super Mystère was a French fighter-bomber and was the first Western European supersonic aircraft to enter mass production.
PL-2 and its derivatives are members of a series of Chinese air-to-air missiles (AAM) originated from the former-Soviet Vympel K-13 AAM, with PL short for Pili (Chinese:霹雳 pinyin: {pīlì}), meaning thunderbolt.
 Unlike PL-2 itself, the second Chinese AAM, most of derivatives of PL-2 failed to enter mass production, with the exception of infrared guided PL-5.

Question: What car functionally serves as the replacement to the longest and heaviest SUV to ever enter mass production?
Answer: Ford Expedition