M-80 Series Muffler 3 in Round 14 in L Hardware Not Incl Polished tailgates-and-liftgates 2L V8 1988 - 1990

2L V8 1988 - 1990 GMC K3500 Sierra SLE 454/7

gov Rotor Diameter 12 Rotor Surface SDZ System Notes Big bearing 9IN with 5 on 4

4 V8 1981 Pontiac Laurentian 265/4

Supports up to 1750 EFI or 2200 Carb HP (@ 60 PSI at 13

M-80 Series Muffler 3 in Round 14 in L Hardware Not Incl Polished tailgates-and-liftgates 2L V8 1988 - 1990Sometimes you just gotta have the best of everything. When it comes to flow, you just can't get anything better than our Race Pro Muffler. This baby features a straight through path that guarantees throughput that's 95 percent of straight tubing! The sound is surprisingly tame considering the absence of any impedance when you look down its barrel. At idle and low rpm cruising, you will not draw much attention, but upon acceleration, bystanders