CrazyWJ242

Its warm today, i just might pull it all apart and see what i can do...

ika667

So I've decided to get flowmaster 44 muffler with 3 inch piping. Talk to an installer in town here and he says he can only go as big as 2 3/4 inch, says that's all he can bend? Does that sound right?

CrazyWJ242

it does, you've got to have special inserts to prevent the pipe from wrinkling, and if he only has it to 2 3/4" id say go with it... i keep forgetting your a V8 lol... i was going to say 2.5" is plenty... but that 5.2L i believe 3" is ideal, assuming you've got atleast an Air Intake System.

ika667

Yeah, I'm doing it in stages. Getting the muffler done this week, next pay check getting the cold air intake, and then headers, and so forth. I hope to be able to squeeze a high flow cat as well this week. So it is possible to get 3 inches, should I seek someone else or settle for 2 3/4?

ika667

Wish I had a garage!

04WJGuy

Phone around and go with the 3" if your going to do it. You may (probably) have to get it in Calgary, Canmore is quaint just not a shopping mecca.

ika667

Yeah, I better get the 3" or I'll probably regret it. Thanks guys. Why do you guys think he won't go bigger than 2 3/4? Why does the pipe wrinkle? Will they charge more for the inserts?

CrazyWJ242

its actually a piece he installs into his bender, not on your exhaust, he uses a hydraulic press with the inside bend and the outer piece just slides around and curves the pipe to the angle necessary...
these pieces prevent the tube from kinking up... just might have an old kit or doesn't work on with larger exhausts often...

Id go with the 3" as its the most common exhaust size for V8's, i dont know if the 2.75" would hurt the flow or not...right now the biggest block in the jeep is probably the flanges bend... if their at all like my buddy's 5.2 new manifolds/headers and flanges would be where id start lol... (but i know his has been beat up abit)

04WJGuy

If your looking at a high flow your probably going to have a hard time finding one in 2.75", and also headers in the future. The collectors would have to be custom mde to fit that size. So your choices would be go with the 2.5" which would be slightly restrictive or wait and get the 3" which will flow nicely.

A 2.5" exhaust in cross section is 4 15/16 square inches while a 3" is 7 1/16 square inches. A very large difference in the way it's going to breath.

Being in Canmore there probably isn't a lot of call for oversized exhuast systems so he doesn't need any inserts larger than 2.75"

ika667

Yeah that is a huge difference! Thanks man I'm going to wait for sure because it would defeat the whole purpose otherwise and be a waste of much needed money!