I have a 2.5 inch with a flowmaster on my '77. It's great above 2400 RPM as far as sound and a bit of extra power, however, the resonance at low RPM is annoying. Anybody know of a fix for this, or a way to reduce it?
flow master 2 chamber is way to loud with glasspack
in the middle.also no back pressure my car had no power with with this set up
on L26.i now have a 2.5 turbo muffler with 6 to 1 motorsport header very nice set up.just my opnion.