Fits 95-97 LT1 LT4 Chevy Camaro Corvette Pontiac Firebird Optispark Distributor Blue A new Optispark distributor for 1994-97 GM LT1 engines. Fits: 1995-96 Corvette LT1/LT4. 1995-97 Camaro Z28, SS. 1995-97 Pontiac Firebird Formula, Trans Am. 1994-96 Chevy Caprice/Impala SS. 1994-96 Buick Roadmaster. Professional Installation is Highly Recommended. (No Instruction and Wiring Diagram Included).