downpipes are confusing! - Subaru WRX Forum
 
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#1 Old 05-25-2007, 09:07 PM
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downpipes are confusing!

So im about to install my injen downpipe and wanted to do some research before I install it because im a noob. I know that my stock heatshield will not fit once I put the DP on. I dont want to modify my stock heatshield just incase I ever sell my car and bring it back to stock. What would be a good aftermarket heatshield to get and will it fit with my aftermarket downpipe? Also, ive heard really good things about wrapping my downpipe but at the same time, ive heard some really bad things about wrapping my downpipe. Whats the deal with the exhaust wrap? Should I wrap it or shouldnt I wrap it? What websites carry these products that you guys recomment? sorry for all the questions but as you can see, im a complete noob.
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#2 Old 05-25-2007, 09:38 PM
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oh crap, and I just read on JSCSPEED.COM that I shouldnt get a downpipe for my 07 until I upgrade my turbo or else ill encounter boost spike?!?!? Two questions, is that true and what the hell is boost spike? It doesnt sound good.
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#3 Old 05-25-2007, 09:41 PM
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get some em and you wont have to warry about that
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#4 Old 05-25-2007, 09:42 PM
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if you get some sort of em you will minimize the boost spike the change in the wastgate duty cycle will pretty much eliminate that

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#5 Old 05-26-2007, 11:05 AM
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any more input?
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#6 Old 05-30-2007, 11:25 AM
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yeah,the gasket for the downpipe to tailpipe is usually garbage,I bought one from a company called remflex,its almost a 1/4 inch thick and is soft enough to conform to the flanges
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#7 Old 05-30-2007, 01:08 PM
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1) cobb makes a decent aluminum heatshield for aftermarket downpipes. Costs $50. You could also make your own pretty easy (some ppl here have)

2) Wrapping is always great and always a pain in the ass. It makes it harder to change out parts but it does keep heat in pretty well. If you don't mind dealing with it, it can make a big difference. It'll just be more work when you want to change something.

3) You need EM for the 06-07 motor if you get a downpipe (has nothing to do with the turbo, that's bad info). There are lots of EM options out there from open source software to the cobb AP to something even more fancy.

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#8 Old 05-30-2007, 08:22 PM
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you might experience boost spike or creep even with em but it is minimal.

EM + heatwrapped DP ftw.

it really isnt as hard as people make it out to be to swap the dp.

Robby
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I defected to an evo :)
Evo is gone :(
Now I got nothing.
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