MY New STi (up and downpipe)
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MY New STi
I just got a 04 Blue Pearl STI. Right noe I only have an ERZ Up Pipe and Downpie on the car but I is a rocket. Just from the up pipe and downpipe I felt the power right after i out them on. I would recommedn anyone to get this combo they are resonably priced and bolted right up
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Joined: Apr 2003
Posts: 1,019
From: LIC Motorsports
Car Info: 2004 Black/Gold STi
Is it really that small of a diameter that it will be detrimental to exhaust flow? Proboly not, 3inch piping is only restrictive at something like 600WHP..... so yeah. no.
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Joined: Oct 2003
Posts: 9
From: Northern Va
Car Info: 98 Eclipse GS-T
Originally posted by SlickmisterN
Is it really that small of a diameter that it will be detrimental to exhaust flow? Proboly not, 3inch piping is only restrictive at something like 600WHP..... so yeah. no.
Is it really that small of a diameter that it will be detrimental to exhaust flow? Proboly not, 3inch piping is only restrictive at something like 600WHP..... so yeah. no.
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Joined: Nov 2001
Posts: 14,221
From: Peoples Republik of Kalifornia
Car Info: 05 H2 SUT, 45 GPW, 10 Murano, 13 Boss 302
Originally posted by TheSpeedFactor
power gains can been seen anywhere from 200-10000000hp with larger diameter exhaust components, though it may be catless, the lengthy exhaust plumbing on the Subarus you want as much flow as possible. We have tested cars first hand before and after a 2.5" vs. a 3" parts such as down pipes or catbacks, to say a little bit larger diameter would be saying that ported or tubular manufolds in other car types a re useless. that i can say from inshop testing is a false statement.
power gains can been seen anywhere from 200-10000000hp with larger diameter exhaust components, though it may be catless, the lengthy exhaust plumbing on the Subarus you want as much flow as possible. We have tested cars first hand before and after a 2.5" vs. a 3" parts such as down pipes or catbacks, to say a little bit larger diameter would be saying that ported or tubular manufolds in other car types a re useless. that i can say from inshop testing is a false statement.
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Originally Posted by Egan
Ya, but we were referring to the uppipe which is only like 20" long. Going from 2" to 2.1/8" isn't going to amount to a whole hill of beans - especially given the turbo inlet and exhaust manifold sizes.
Originally posted by Wingless Wonder
Why'd you replace the factory uppipe?
Why'd you replace the factory uppipe?
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Joined: Apr 2004
Posts: 115
From: home
Originally Posted by dtg1109
I just got a 04 Blue Pearl STI. Right noe I only have an ERZ Up Pipe and Downpie on the car but I is a rocket. Just from the up pipe and downpipe I felt the power right after i out them on. I would recommedn anyone to get this combo they are resonably priced and bolted right up
I have read that the stock up-pipes are not flow through pipes. There is somthing in them, like a silencer or somthing. Also the flex that Subaru uses isnt the mesh stuff, it makes the metal look kinda like a slinky. Whereas you can get a better flowing up pipe. If you wanna keep the gasses hot, jet coat the inside and out of the pipe. It isnt too expensive. With all this good there is some bad. Paying more cash for a millisecong quiker boost, very few hp gain, and installation. But if your pullin the turbo off anyway to get it ported why not but a used up-pipe for $100 or less and get the extra power while the oppertunity for easier installation is there. FYI: I plan on doing it to my car (jet coated).
Nick
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