Magnaflow muffler ....

On my 89 Shelby Dak with mildly built 318 (alum hds, comp roller cam, eddie performer, FITech, 2-1/8 HP Cast Exhst, 347 hp @ flywheel, a-500, 2400 stall, 3.91 SG). Started with Flow Master super 40s - everybody outside the trk loved the LOUD rasty sound- inside couldn't carry on a conversation even with the windows up - cab is WELL insulated. Added Flow Master resonators in front of mufflers - smoother sound but resonance in cab between 1700-2400 was close to painful. Changed to Magnaflow dual 2 1/2 to 3" single out (stealth look). Sweet low rumble - sings nicely above 3000 - can talk and listen to radio even with windows open.