Description
Overview
The Flowmaster American Thunder® Exhaust System Kit is a complete true dual, Crossmember-Back exhaust system engineered for 1970-1974 Chevrolet Camaro and Pontiac Firebird models equipped with a V8 engine (307, 350, 400, 402, 455). Built to deliver serious street presence and real performance gains, this exhaust system combines mandrel-bent tubing, high-flow mufflers, and a built-in balance tube to help your classic breathe better and sound the part.
If you’ve been searching to shop for exhaust upgrades that transform your muscle car’s attitude, this performance exhaust package brings everything you need together in one kit. From the crossmember back to the rear bumper, every component is designed to work as a system for a clean, aggressive result.
Key Benefits
At the heart of this car exhaust setup is a pair of Slimline 50 Series® Delta Flow mufflers (muffler part number 932556) that produce a moderate to aggressive interior and exterior tone. It’s an exhaust tuned for the enthusiast who wants their performance to be heard, both inside the cabin and out on the street. The system routes 2.50-inch mandrel-bent aluminized steel tubing through a built-in H-pipe/balance tube for maximum flow, and Flowmaster reports benefits including improved throttle response, power, and mileage.
The dual 2.50-inch tailpipes exit straight out under the rear bumper and are finished with 2.50-inch angle-cut brushed stainless steel tips for a purposeful, aggressive look. U-bolt clamping and all necessary hangers and hardware are included, making this a genuinely complete exhaust system rather than a loose collection of parts.
Highlights
- Complete true dual Crossmember-Back exhaust system for 2WD applications
- 2.50-inch mandrel-bent aluminized steel tubing with a 2.50-inch inlet diameter
- Built-in H-pipe/balance tube for maximum performance and flow
- Slimline 50 Series® Delta Flow mufflers (P/N 932556) with a moderate to aggressive tone
- Dual 2.50-inch tailpipes with angle-cut brushed stainless steel tips
- U-bolt clamping type, all hangers and hardware included; CARB (California) compliant
Fitment
This American Thunder® exhaust system is designed as a bolt-on catback-style upgrade for 1970-1974 Chevrolet Camaro and Pontiac Firebird V8 vehicles. It is a 2WD, Crossmember-back configuration and is CARB (California) compliant (Emission Code 5). Please note the California Proposition 65 warning applies. A heat shield is not included with this system.
Whether you’re comparing it against a Borla exhaust, Corsa exhaust, MagnaFlow exhaust, or Walker exhaust build, this Flowmaster kit delivers a proven performance exhaust solution built specifically for these classic GM V8 platforms. Backed by Flowmaster’s 3-year Limited Warranty, it’s a straightforward way to give your Camaro or Firebird the sound and flow it deserves.
