Catback Exhaust for Chevy Camaro & Pontiac Firebird (1998-2002) 5.7L LS1 LT1 EngineHigh Flow Mandrel Bent Catback Exhaust for 1998 2002 Chevrolet, Pontiac Camaro, Firebird (LS1 F Body) What it Does: Replaces the restrictive factory exhaust system with a high diameter, mandrel bent stainless steel setup to reduce backpressure and improve exhaust scavenging for the LS1 engine. The Stock Camaro and Firebird Exhaust Limitations The factory exhaust system on the 1998 2002 GM F Body platform is a primary bottleneck for the LS1 engine's