Intake & Exhaust Questions and info regarding various aftermatket exhaust systems for the G35 (Headers,Y-Pipes, and Cat-Back Systems)

Diameter of stock exhaust?

Old Apr 1, 2007 | 12:08 AM
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Diameter of stock exhaust?

What is the diameter of the stock exhaust after the y pipe. I am considering having a custom exhaust made, but don't want to go crazy big. Maybe like 1/4 to 1/2 inch larger than stock with Magnaflow resonator and muffler.
 
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Old Apr 1, 2007 | 11:02 AM
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From: Kansas City
About 2.4" ID.
 
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Old Apr 1, 2007 | 08:35 PM
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Exhaust.......bigger isn't alway better!

Don't waste your $ on some muffler dudes idea of what your G needs! The
company's that put out exhaust systems for our cars spend weeks on the
dyno finding the correct size and sound. Most exhaust systems for the G
are 2 1/2" mandrel bent stainless steel pipe.....anything larger will cost you
bottom end torq. (unless you intend going forced induction) Stick with
Magnaflow, Stillen or HKS for the best cat-back systems!
 
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Old Apr 2, 2007 | 02:37 PM
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Originally Posted by gary c
Don't waste your $ on some muffler dudes idea of what your G needs! The
company's that put out exhaust systems for our cars spend weeks on the
dyno finding the correct size and sound. Most exhaust systems for the G
are 2 1/2" mandrel bent stainless steel pipe.....anything larger will cost you
bottom end torq. (unless you intend going forced induction) Stick with
Magnaflow, Stillen or HKS for the best cat-back systems!
That's easy for you coupe guys, but us sedan guys have little to chose from. Other than Stillen, Borla and HKS rear section (muffler only) everything else is a fart can.
 
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