Quote:
quote:Originally posted by hyracer
If I remember right "pipe" and "tubing" are measured differently.
Pipe is measured on the ID...and tubing is measured on the OD. Hence your 2.5" exhaust tubing has an outside diameter of 2.5". When you say Mopar is really selling you a 2 3/8" system that is not really correct, because the "OD" is 2.5" just like they say it is. If you measure your stock GT exhaust system you'll find it measures 2.25" OD so you really are jumping up a quarter inch in diameter.
Deen
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You are correct. Most if not all 2.5" systems are actually 2 3/8 I.D. So the tail pipes on the Mopar CAT back are actually 1 5/8 even smaller. My main point is that the Mopar system is not straight through and is more restrictive,period. I would say the btg axle or CAT back system or any straight through exhaust for that matter will flow better than the Mopar CAT back system!
The biggest restriction in the exhaust is from the turbo, o2 housing and CAT. I feel the most benefit would be to open up the CAT as large as possible and using a straight through resonators +/or muffler.
As far as losing low end torque any thing that will allow the turbo to spool quicker is going to build low end torque and top end power.
Just my 2 cents worth
edit;Changed opinion on exhaust size.