Description
Overview
The Flowmaster 80 Series Chambered Muffler is a cross-flow muffler engineered for late model muscle cars that demand a bold, unmistakable exhaust note. Part of the 80 Series Crossflow lineup, this muffler is designed for applications where the muffler is mounted transversely behind the rear end, making it a purpose-built solution for tight, rear-mounted exhaust layouts.
What sets the 80 Series apart is its cross-flow design, with the inlet located next to one of the outlets on the same side of the case. This layout allows the muffler to be positioned sideways behind the rear axle while still routing your exhaust cleanly, giving you an aggressive muscle car sound both inside and outside the vehicle.
Built to Last
Durability is engineered in from the start. The 80 Series is constructed of 16 gauge aluminized steel and fully MIG welded for maximum strength, standing up to the heat and vibration of real-world driving. A high-temperature paint finish helps the case resist the elements and maintain a clean appearance under the vehicle.
Sound & Performance
If you want your car to announce itself, the 80 Series delivers. This is an aggressive-tuned chambered muffler tailored for the classic, deep muscle car character that enthusiasts chase. The chambered internals produce that signature tone both at idle and under throttle, filling the cabin and turning heads on the street.
Configuration & Fitment
This muffler features a 2.50-inch inlet and a dual outlet configuration, with the inlet positioned alongside one outlet on the same side of the case to suit its crossflow, transverse mounting orientation. It carries an Emission Code of 5 and is intended for late model muscle car applications.
Installation uses new hangers, which are not included, so plan to source the appropriate mounting hardware for your setup. Exhaust tips are also sold separately, giving you the freedom to finish your build exactly the way you want.
- 80 Series Crossflow chambered muffler with cross-flow design
- 2.50-inch inlet diameter with a dual outlet location
- 16 gauge aluminized steel construction, fully MIG welded
- High-temperature paint finish for durability under the vehicle
- Aggressive muscle car sound inside and out
- Designed for transverse mounting behind the rear end
For anyone chasing that unmistakable muscle car growl in a rugged, purpose-built package, the Flowmaster 80 Series Chambered Muffler brings the aggressive attitude and welded-steel durability to match.







