Model A Ford Muffler - Original Tapered Style - Polished Stainless Steel - USA Made

The internal pipe has a quantity of 172, 1/4" porting holes & 3 baffles, which is the correct baffling system to create that original muffler sound, and also eliminate engine back pressure.USA made. Independent testing with a dynamo test machine (volume 5, Number 1 of Secrets of Speed, July 1995) shows the original design mufflers (A5230ARORG, A5230ORG and A5230ORG/SS) increased power by 3.8 horsepower, or a 7.8% increase over the inexpensive muffler (A5230). This is because the inexpensive muffler does not use the correct diameter pipe or the correct internal baffles; therefore, flow of the exhaust gases from the muffler is restricted, which will affect horsepower. We strongly recommend purchase of #A5256E muffler clamp with purchase of any Stainless Steel muffler. It will allow tendency of SS to "flex" & eliminate any future outlet pipe stress issues.