Flowmaster Header-Back Exhaust System 409S - Dual Rear Exit-AmeriCan Thunder - Aggressive Sound - 3" Tailpipe 24232306 000 RPM on V-8 engines

000 RPM on V-8 engines

358 lb/in Spring Rate

Super Late Models

Edelbrock Intake

Flowmaster Header-Back Exhaust System 409S - Dual Rear Exit-AmeriCan Thunder - Aggressive Sound - 3" Tailpipe 24232306 000 RPM on V-8 enginesHeader back System 409S Dual Rear Exit American Thunder(R) Aggressive Sound Fits 1968 to 1972 GM A Body with a V8 engine. For the person who is looking for a complete Header back dual exhaust system with an aggressive tone. This system is mandrel bent for maximum performance and includes specially selected mufflers. American Thunder systems deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their