Uppipe Question!? - Page 2 - Subaru WRX Forum
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#16 Old 11-22-2005, 12:13 AM
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nope, no cat on the uppipe of 06s... If you did add an aftermarket uppipe, maybe <1 whp on the dyno in my opinion.


Cobb Stage II 2006 WRX
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#17 Old 11-22-2005, 01:07 PM
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You might want to compare inside diameters of the different pipes. If you're worried about installation you can get one with a flex.
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#18 Old 11-22-2005, 10:34 PM
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here in australia i simply remove the rattley heat shields, cut the cat out of the up pipe and replace it with a straight piece of stainless and heat wrap the whole thing. cost bout 10-15 au$ when you remove your stock ones you might notice the pipe diameter is the same the whole length of the up-pipe until 1 inch from the top flange where it has a taper. this accelerates the exhaust gasses just before they hit the turbine. subaru do this to help the turbo spool quicker.
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#19 Old 11-22-2005, 10:41 PM
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yea i couldnt believe it either, was crusing nasioc and low and behold learned that the 06 doesnt have a cat on the UP.
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#20 Old 11-23-2005, 12:28 PM
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I like the Turbo XS one. Has a flex joint, and retains the stock inside diameter.
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#21 Old 11-23-2005, 02:01 PM
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Invidia TBE No cats on my 06

Invidia seems to be good quality

Chris- ▼SbiΣ Mi▼
242 AWHP / 318 TQ
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#22 Old 11-23-2005, 10:17 PM
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I have the Helix with the flex joint, got as package deal with headers from gruppe-s. No complaints, great sound, awesome power as part of total mods.
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