Mainfold Exhaust Header for Chevrolet Camaro/Pontiac Firebird (1998-1999) With 5.7L V8 EngineHigh Velocity Exhaust Manifold Headers for the 1998 1999 Chevy Camaro & Pontiac Firebird LS1 Who Its For: Engineered for 1998 1999 F Body owners running the legendary 5. 7L LS1 V8 powerplant who are tired of the stock manifolds restrictive breathing and excessive heat retention. The Symptom: The factory exhaust manifolds on the early LS1 engines are heavy, cast iron "log" designs built for mass production and engine bay silence, not performance. These