Flowmaster 43083 - 80 Series Chambered Muffler

80 Series Crossflow Muffler - 3.00" (O) / 2.5" OUT (D) - Aggressive Sound The 80 series is a cross-flow design for applications where the muffler is mounted transversely behind the rear end. Delivering an aggressive muscle car sound both inside and outside the vehicle. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.