Engine/Power - EJ25T (STI and 2006+ WRX) Discussions about the USDM 2006+ WRX and WRX STi 2.5 liter turbo flat-four.
View Poll Results: Which EL header should i get
Invidia Race
0
0%
Killer b
4
40.00%
Tomei
3
30.00%
Other (make a comment)
3
30.00%
Voters: 10. You may not vote on this poll

Help me decide on a EL header

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Old Dec 20, 2013 | 12:46 AM
  #16  
LOL_VTEC's Avatar
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From: Bay Area 925
Car Info: 2018 Tacoma TRD PRO
I would just find a good used OEM header in your case. I wouldnt spend extra money on an aftermarket uel when the oem one will do exactly the same

Originally Posted by Holdenian
not to thread jack, but in regards to UEL, tomei or borla? or maybe something else? I've also been recently researching decisions... I don't plan to do this for a while, but the plan is roughly 300 whp on an 04 wrx. my headers have to go anyway because they're rusty
Old Dec 20, 2013 | 12:46 AM
  #17  
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Btw to the OP,

I voted for the Perrin EL header
Old Dec 20, 2013 | 12:59 AM
  #18  
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From: philz coffee
Car Info: @eatwithnaveed
Originally Posted by LOL VTEC
I knew you'd see it my way

btw, hows the wagon? If your ever selling it throw me a PM with your best price.
It's good man. Just a cool little daily driver. Haha. And Sounds good man! I definitely will since you hooked it up.
Old Dec 21, 2013 | 10:40 AM
  #19  
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Car Info: 04 wagon
Thanks for the input.

I heard KB uses a small diameter on the tubes but couldnt find the actual number. Anyone here know the tubing diameter on the Killer B or Full Race headers? Leaning towards these 2 at the moment. Ive read alot of guys have flange leaks with the Perrins so dont think I want to go that way.

Theres something that bugs me with each one though. KillerB, its the odd design. I dont like how all the tubes merge into 1 tight elbow. To me it looks like a bottleneck. Also all the testing ive seen show the 4 into 1 headers to move the powerband higher up (5k-7k+). Im not sure thats where I want it unless i was running higher cams, which i'm not. Also I have to use their uppipe, which isnt a huge deal, I just already have one thats working great.

With the Full Race, the powerband is in the lower range (3k-5k), which I would get more use out of. The problem is the thing is a tank and weighs more then the stocker and i've reduced alotttt of weight on the car so I cringe a little at the idea of adding weight back near the nose. It also looks like theirs might hang lower then others, but its hard to tell from the pics i've seen.

I ran across this dyno, which I thought was a good comparison of a 4 into 1 header vs the full race style. It shows where each places the powerband. Green being the full race header.

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Last edited by ddavis; Dec 23, 2013 at 12:08 PM.
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