American Thunder Header Back Exhaust System; Dual; Dual Rear Exit; Incl. 2.5 in. Tubing/X-Member Back/H-Pipe/Hardware/Super 40 Series™ Mufflers;
For 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 response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.
  • Mandrel Bent 16 Gauge Aluminized Tubing
  • Moderate to Aggressive Exterior Exhaust Tone
  • Includes Hangers And Hardware For Easy Installation
  • Connects After Factory Catalytic Converter
  • Premium Flowmaster Quality
  • Made in the USA
  • 3 Year Limited Warranty

Application Summary:

Year Make/Model
1965-1967 Buick Gran Sport
1970-1972 Buick GS
1968-1969 Buick GS 350
1968-1969 Buick GS 400
1970-1972 Buick GS 455
1964-1972 Buick Skylark
1968-1969 Buick Special
1964-1972 Chevrolet Chevelle
1964-1972 Chevrolet El Camino
1964-1967 Chevrolet Malibu
1970-1972 Chevrolet Monte Carlo
1965-1967 Oldsmobile 442
1964-1972 Oldsmobile Cutlass
1971-1972 Oldsmobile Cutlass Supreme
1964-1972 Pontiac GTO
1964-1973 Pontiac LeMans
1968-1970 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.