Flowmaster American Thunder Dual Exhaust System - 1964-72 El Camino/GMC Sprint V8 SR91152PUO-5 Used by Joe Gibbs Racing

Used by Joe Gibbs Racing in every rear end differential

often requiring the rubber edge around the bottom trim edge and eyeport to be replaced

Reduces heat related pump failure

1972-1984 Oldsmobile 98

allowing plate to be welded in place

Flowmaster American Thunder Dual Exhaust System - 1964-72 El Camino/GMC Sprint V8 SR91152PUO-5 Used by Joe Gibbs RacingFor the person who is looking for a complete header back dual exhaust system with an aggressive tone. With easy fit in mind, these systems are mandrel bent for maximum performance and include specially selected mufflers. American Thunder systems deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle