i just got a good deal on a pair of flowmaster 40's but the inlet/outlet is 2 1/4"...the shop should be able to fit an adapter on the mufflers w/o a problem so they'll fit the gp, correct? thanks...
iirc the 40's will fit fine. you are running 2 muffs right? that 2.25" * 2 will give you more flow than a 3" exhaust. Even if you have a larger exhaust already, just have them weld it up to the muffs. No need for an adapter imo.