Exhaunst manifold vs uppipe - Subaru WRX Forum
 
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#1 Old 04-29-2005, 10:22 AM
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Exhaunst manifold vs uppipe

Why does everybody replace just their uppipe when they sell these "exhaust manifolds" with the uppipe included? are they a total waiste of money or something? Seems like uppipes are $150-$250 and a manifold can be had for $450 - $1000
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#2 Old 04-29-2005, 12:28 PM
 
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The uppipe and manifold combo just kills two birds w/ one stone. The manifold is not worth it IMO, you sacrafice low end for a little top end.
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#3 Old 04-29-2005, 12:43 PM
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how does it reduce low end?
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#4 Old 04-30-2005, 10:52 AM
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my car runs fine. no reduction in low end, but the stainless makes a tiking noise when the car is running. it acually spools faster.
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#5 Old 04-30-2005, 04:17 PM
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I have tried three different headers on my car, and all of them reduced low end and spool time. A magazine not long ago reviewed all of the different ones on the market, and had the same results.

Here's the problem....

The headers are based on a design that was originally made for the JDM STi engine, which has a 9000 rpm redline. None of the headers start making any hp gains until 6500 or so. Which is fine with a 9000 rpm redline. But, with the 7000 rpm redline, we see little or no gains, and lose on the low end. I have installed headers on at least 4 different cars, and all have gone back to the stock manifold within a few months.
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#6 Old 04-30-2005, 05:18 PM
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wow cosmo, i dont think ive ever heard you say that before
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#7 Old 05-12-2005, 06:32 PM
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The uppipe upgrade is the way to go more bang for the buck.
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#8 Old 05-12-2005, 09:24 PM
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Quote:
Originally Posted by Aurora1
The uppipe upgrade is the way to go more bang for the buck.
That's not correct. A new uppipe will give you very little gains if any. It is a good mod for turbo safety, but doesn't add any power. A downpipe will add noticable power.
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#9 Old 05-13-2005, 05:19 PM
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He was comparing the exhaust manifold upgrade to the uppipe upgrade. Not the uppipe upgrade to the downpipe upgrade.
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