The Edelbrock High-Flo T.P.I. System is for 1985-91 Corvettes (except LT1), Camaros and Firebirds with Tuned Port Injection systems. The High-Flo TPI System requires no changes to the stock computer and makes an 18-20 horsepower gain over stock. A combination of different yet interchangable manifold baseplates allow you to upgrade from stock to pre-85 non-centerbolt style cast iron or aftermarket aluminum as well as 1996 and newer Vortec style cylinder heads for even more performance!