C4 Corvette Air Foil Throttle Body Booster Fits: 85 through 96 L98 LT1 LT4 Corvettes Fits C4 Corvette 85-96 LT1 and LT4 engines. Will Not Fit the ZR1 LT5 engine. Improve throttle response. Boost intake flow by 30 CFM. Add up to 11 horsepower.