Description
Overview
The Flowmaster Crossmember-Back Exhaust System is a mandrel-bent, headers-back pipe kit custom designed for most 1968-1972 GM A-body cars. Built for the enthusiast chasing a true dual exhaust setup, this kit delivers a purpose-engineered exhaust path from the headers rearward, using all mandrel-bent 3.00-inch aluminized steel tubing to keep flow smooth and restriction low. If you’re building a classic A-body and want a system engineered around genuine dual pipes rather than a compromise, this is a foundation worth starting with.
Because it ships without mufflers, you’re in the driver’s seat when it comes to sound. Add the Flowmaster performance mufflers that match the tone and volume you’re after, then finish the look with the exhaust tips of your choosing. It’s a flexible approach that lets you dial in the exact character of your build.
Key Benefits
The system incorporates an H-pipe to equalize exhaust gas pressures side to side, balancing the sound and helping the engine breathe for maximum performance and maximum clearance. The 16-gauge, 3.00-inch aluminized steel tubing provides substantial pipe wall strength, and the U-bolt clamping type keeps assembly straightforward. Dual tail pipes give the car the aggressive rear-exit stance that A-body owners expect from a proper performance exhaust.
- All mandrel-bent 3.00-inch aluminized steel tubing for smooth, high-flow exhaust routing
- H-pipe design equalizes gas pressures for balanced sound and maximum performance and clearance
- 16-gauge pipe wall with silver aluminized finish and U-bolt clamping
- Dual tail pipe configuration for a true dual exhaust look and feel
- CARB (California) compliant, Emission Code 3
- Backed by a 3-year Limited Warranty
Muffler & Tip Options
Mufflers are sold separately so you can tailor the sound level to your preference. The system requires a 3.00-inch offset inlet with an opposite-side offset outlet, such as part #943048 (Super 44 Series) or #53058 (Super 50 Series) mufflers. Exhaust tips are also sold separately, giving you the freedom to complete the build your way.
Fitment & Installation Notes
This kit is designed for an easy fit on most 1968-1972 GM A-body cars and uses new hangers, which are not included. Please review the following before ordering:
- Does not include mufflers, exhaust tips, header collector adapter cones, or hardware
- Uses new hangers (not included)
- Does not align with the factory Oldsmobile 442 bumper cutouts
- Fabrication is required for installation of the H-pipe
For classic GM A-body owners who want a mandrel-bent, true dual exhaust they can customize to their exact taste, the Flowmaster Crossmember-Back Exhaust System is a smart, performance-minded starting point.
