Description
Overview
The Flowmaster Crossmember-Back Exhaust System is a mandrel-bent, true dual exhaust solution custom designed for most 1964-1972 GM A-body cars. Built for the enthusiast who wants a genuine true dual exhaust setup, this kit delivers free-flowing performance and factory-quality fitment without the guesswork of piecing together a custom system. It comes complete minus the mufflers, so you can dial in exactly the sound level and character you want from your Flowmaster performance mufflers.
Key Benefits
Every tube in this system is mandrel-bent from 2.50-inch aluminized steel, preserving full pipe diameter through every bend for smooth exhaust flow and consistent performance. An integrated H-pipe equalizes exhaust gas pressures between the two banks, improving both sound and performance while maintaining maximum ground and chassis clearance. The dual tailpipe design gives your classic A-body an aggressive, purposeful stance out back.
Because the mufflers are sold separately, you’re in full control of the tone. Pair the system with Flowmaster performance mufflers to match your preferred sound level — from mellow to aggressive — and build the exhaust note that suits your car and your driving style.
Highlights
- All mandrel-bent 2.50-inch aluminized steel tubing for maximum, unrestricted flow
- H-pipe crossover to equalize exhaust pressures for better sound and performance
- True dual exhaust with two styles of tailpipe exits included
- Silver aluminized finish with U-bolt clamping for a secure connection
- Includes all necessary parts, hardware, and instructions for an easy install
- CARB (California) compliant with Emission Code 3
The Muffler Option
This is a Pipes Only system — mufflers, exhaust tips, and heat shields are not included, giving you the freedom to complete the build your way. The system requires 2.50-inch Offset Inlet / Opposite side Offset Outlet mufflers such as part #942548 (Super 44 Series) or #52558 (50 Series). Choose the muffler series that matches the sound level you’re after, then finish the setup with the tailpipe exit style you prefer.
Fitment
Engineered specifically for most 1964-1972 GM A-body cars in 2WD configuration, this crossmember-back kit is designed for an easy, bolt-on fit. Because it’s tailored to the A-body platform, you get precise routing, proper clearance, and a clean installation that looks and performs like it belongs. The complete kit ships with the pipes, hardware, and instructions needed to get the job done, and it’s backed by a 3-year Limited Warranty.
If you’re restoring or upgrading a classic GM A-body and want the deep, balanced tone and improved flow of a true dual exhaust, this Flowmaster crossmember-back system provides the mandrel-bent foundation to build on.
