GS - 1st Gen (1993-1997) Discussion about the first generation GS300

What is the diameter of our stock piping?

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Old 01-29-04, 09:45 PM
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Wald GS
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Default What is the diameter of our stock piping?

I plan on doing a straight pipe to my exhausts either with or without resonators. What would you guys recomend the new diameter of the pipes be? Also what is the stock diameter of the piping?

Thanks

Bryan

Last edited by Wald GS; 01-29-04 at 09:45 PM.
Old 01-29-04, 11:01 PM
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Jmai22
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stock is like 1 3/4 or 2 or so inches. i would do 2.5 inches from cat back or unless if you are still planning on the turbo i would do 3 inches.
Old 01-30-04, 01:03 PM
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indypwr
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brian:
do a 2 1/4 piping from cat back......i might chnge mine though to 2.5 like john said....
if u take off yr resonators........good luck and dont get pulled over!!!....trust me, after a while, it will annoy you.
Old 01-30-04, 08:39 PM
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geees300
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Originally posted by indypwr
brian:
do a 2 1/4 piping from cat back......i might chnge mine though to 2.5 like john said....
if u take off yr resonators........good luck and dont get pulled over!!!....trust me, after a while, it will annoy you.

true that on the annoying noise. also make sure you use mandrel bent pipes...max size should be 2.5"...don't forget your ear plugs

Last edited by geees300; 01-30-04 at 08:40 PM.
Old 02-04-04, 02:00 PM
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siniquezu
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Only go 3" if you're planning on single exhaust. Rich (lex400sc) did a 2.5" stright dual cat back.
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