MustangForums.com - View Single Post - Cutting the y-pipe for H-pipe duals. Affected Backpressure?

raz54 · 09-12-2007, 03:20 PM

I'm not sure on your MPG but if you lower your back pressure too much you will sure lose low end tq. If you stay with 2.25" pipe and keep all the cats you should be OK with true duals.

09-12-2007, 03:20 PM	#3
raz54 4th Gear Member Join Date: Jan 2007 Location: Eureka, Ca. Posts: 1,758	RE: Cutting the y-pipe for H-pipe duals. Affected Backpressure? I'm not sure on your MPG but if you lower your back pressure too much you will sure lose low end tq. If you stay with 2.25" pipe and keep all the cats you should be OK with true duals. __________________ My 04 Mustang is a hybrid, it burns gas and rubber.