Flowmaster American Thunder Dual Exhaust System - 1964-72 El Camino/GMC Sprint V8 29020BL 5/64 in Screen Spacing

5/64 in Screen Spacing

It comes with bolts and an adapter bushing for 5/8" and 3/4" water pump shafts

Auto Meter Pro-Comp

Four strips contain six individual break-away blades that are easily removed or separated using needle nose pliers

Flowmaster American Thunder Dual Exhaust System - 1964-72 El Camino/GMC Sprint V8 29020BL 5/64 in Screen SpacingFor 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