Flowmaster 817412 - Header-back System 409S - Dual Side Exit - American Thunder - Aggressive Sound

Flowmaster 817412 - Header-back System 409S - Dual Side Exit - American Thunder - Aggressive Sound

Flowmaster American Thunder Crossmember-Back Exhaust System

American Thunder Header Back Exhaust System; Dual; Dual Side Exit; Incl. 2.5 in. Tubing/Super 40 Series™ Mufflers/H-Pipe/Hardware; 409 Stainless Steel;

This American Thunder(R) exhaust system comes as a complete true dual crossmember-back exhaust for your 1964-1967 GM A-body with a V8 engine. These dual exhaust systems feature 2.50-inch mandrel-bent stainless steel tubing for maximum performance, includes a built-in H-pipe/balance tube flowing into a pair of large case Super 40(R) mufflers that deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The 2.50-inch tailpipes exit at the rear corners of the car and angle down under the rear bumper for a strong muscular look. The system includes all hangers and necessary hardware for installation. Like all Flowmaster(R) systems, the benefits include improved throttle response, power and mileage and is covered by our Lifetime Limited Warranty.

• Mandrel Bent 16ga 409S Stainless Tubing
• Limited Lifetime Warranty
• Aggressive And Powerful Exterior Exhaust Tone
• Incl. Hangers and Hardware For Easy Installation
• Header Back System
• Dual Out Rear Exit
• Dyno Tuned for Maximum Performance
• Premium Flowmaster Quality