Muffler question...

[Loud Pedal]

Hi,
I'm replacing my exhaust with 4" turbo back. I'm wondering what is the difference in flow rate between the factory muffler and a 4" performance muffler (meaning, is there enough benefit to justify the cost). Also, The cat will be a place holder only, so no flow issues there).
your thoughts..

[kayden101]

unless your having lots of HP/torque or towing heavy Its mainly for the great sound the 4inch with 5inch tip gives and looks.

It does help cool. but some say it doesnt. I have noticed a difference while towing heavy with my pyro. but nothing really without towing.

[haroldm1898]

I just replaced my exhaust w/4" on '97 2500 and there is definite difference in hp and throttle response along w/ 1 more mpg. The extra torque also brought out trans. issues(4 sp. auto) I didn't know I had before but it was minor and is fixed. Truck runs better than ever!

[Loud Pedal]

thank you for the wisdom...I'll get the muffler (25.00 and brand new), replace the muffler, and "fix" the cat....