BBK 1757 80mm Throttle Body - High Flow Power Plus Series for GM 4.8, 5.3, 6.0L Truck and Hummer H2 BBK is your Number One Aftermarket Performance Brand in the USA - American Designed and Built High Flow Power Plus Series 80mm Throttle Body Increases Airflow to Improve Horsepower and Throttle Response Over Stock Recommended For Vehicles Where Modifications Have Been Made or are Planned Especially Cold Air Intakes and Exhaust All New CNC Machined Casting Assembled with Components that Exceed OEM Standards, They Will Offer Years of Trouble Free Performance Simple Direct Bolt on Replacement for Factory Unit Fits all 03-06 GM 4.8,5.3,6.0L Trucks and Hummer H2 Vehicles