I know a gst catback will fit our cars, but will a testpipe made for a gst fit the stock piping on our cars?




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The GS-T has the same pipe diameter as the GS/RS(2.25in)....so as far as diameter is concerned it will work. Actually, I run a 2.5in testpipe and it fits ok - the 2.25 one would probably fit better. As far as using one "designed" for one or the other - you only have to worry about that if the flanges are welded to the test pipe. I got my test pipe from testpipe.com - and the flanges float. You can turn the flange to mount them at whatever angle you want. I'm not 100% sure, but I think the cat flanges are the same SIZE on the GS-T and GS/RS models, I have no idea if the flange angles are the same. So if the flanges are welded - I'm not sure if it'll work. If the flanges are floating - it should work just fine.


ride__________95 Eclipse RS : 5 speed
power________Field SFC Hyper-R : Gude cams : Jeep TB : AFX UDP : ram air : test pipe : GST catback
suspention___Hurricane F/R lower strut ties : BOMZ F/R upper strut bars : ES inserts
sound________Kenwood KDC 5000 : Audiovox 8" sub toob - no sub amp(damnit!)
shizzle_______AutoCommand remote start : dual air horns : Caspers o2 simulator(rear)
incomming___Bosal header
Jeep TB writeup - http://www.dimensia.com:81/jimbo/JeepTBfor2gnt.html

it will not, i bought a test pipe from extreme for a gst, the flanges didnt line up, flanges on a gst are straight, GS and RS have one straight, one angled, so i took it back and they sold me a highflow cat with the flanes welded the right way for less that usual, i am dumb, i should have told them that it was for a gs or rs to begin with!

How much does a test pipe help when you have a Stock Exhaust?

adam

with stock exhuast u *coulc* see anywhere from 3-10hp witha aftermarket exhaust it should be better

Maybe I should have started this post with "a guy I know asked....." but I wanted to keep it short.

He has a rear section but his exhaust is stock other than that. I told him to get a custom exhaust and keep his muffler. He just wants a testpipe instead.



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