American Thunder Header Back Exhaust System; Dual; Dual Side Exit; Incl. 3.0 in. Tubing/Super 40 Series™ Mufflers/Welded H-Pipe/Turndown Tailpipes; 409 Stainless Steel;
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 3 in. systems generally deliver an aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The sound level will depend greatly on the engine and level of modification. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.
  • Mandrel Bent Stainless Steel Tubing
  • Limited Lifetime Warranty
  • Moderate 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
  • Patented Delta Flow Technology

Application Summary:

Year Make/Model
1965-1967 Buick Gran Sport
1965-1967 Buick Skylark
1964-1967 Chevrolet Chevelle
1965-1967 Oldsmobile 442
1964-1967 Oldsmobile Cutlass
1967 Oldsmobile Cutlass Supreme
1964-1967 Pontiac GTO
1964-1967 Pontiac LeMans
1963-1967 Pontiac Tempest

Additional Information:

Fast Efficient Shipping

Through our distribution network Deliveries can be as fast as Next Day Delivery.
Delivery times vary by destination, tracking information is provided with every purchase.

Get it Installed

JB's Power Centre offers on-site professional installation services in Calgary and Edmonton, AB.
We have on staff licensed Mechanical Technicians as well as MECP Certified 12-Volt Technicians.

* Extend your products Manufacturer Warranty

All products include a manufacturer warranty, but you can extend this warranty with
JB's Purchase Protection Plan
*Available on select products.