MAC or Dynomax or Flowmaster

[jrgoffin]

Just to add to that for reference...

If you look at flow numbers for a straight pipe vs. a straight-through muffler (like a Dynomax Ultra-flow), vs. a Super-Turbo, vs. a chambered muffler (ie., FlowMaster), you'd get #'s something like this (all 2.5"):

Straight pipe: 475+CFM
Straight-through muffler: 450+CFM
Super-Turbo: 425+ CFM
Chambered: 325+ CFM

Of course these numbers all vary from test to test, but it gives you a ball-park idea! I'm still glad I removed my FlowMasters (2nd set) and went to the Super-Turbo's!