C4 Corvette Smooth Air Intake Front and Rear Coupler Hose Combo Kit Fits: 94 through 96 LT1 LT4 Corvettes Fits the C4 Corvette 94-96 including the LT1 and LT4. It will Not fit the ZR1 LT5. Upgraded Front and Rear Smooth Air Couplers. Improve Acceleration and Throttle Response. Improve Gas Mileage. Does NOT fit the ZR1.