can anyone tell me if tis header will fit a my99 uk impreza

 

AFAIK the majority if not all aftermarket headers will fit both "classic" and "bug-eye" Impreza's.

Interested to hear otherwise.

Alan

 

so this would be a good buy for £300 brand new

 

It might be, but on the other hand your knock sensor may stop working and lose low down spool. I prefer to select the correct turbo size. Whatever, without custom ECU remapping you are not going to make the most of it. Have you ported the OEM headers?

 

John those are not equal length headers so somewhat different effect possible.
Stevebt what diameter are the pipes including the up pipe.

 

still seems cheap to me..!!

Dan

 

Certainly would be for £300.

Would you be willing to part with info on how to get them for that price?

Alan

 

already talking to company in the states, there a KMD header and uppie and its $450 plus shipping but there is no mention of sizes just says it fits a ej20 2ltr turbo and its unequal length

 

yhm steve

 

I think it woul be interesting to see how these headers perform with a LINK or TEK ecu upgrade.
But for 300 squids you cant go wrong.
Gez

 

Don't like the look of the collector. Or rather - is that meant to be a collector?
It might be cheap, but it might not be any better than the standard one - headers are fickle things!

 

thats why i put it up for advice, even though it isnt much money i still dont want to throw my money away. iwas told i could have a refund if it was no good but id have to ship it back to the states

 

Opens up the question again....are these things actually any good???? Are there 'real' gains to be had by fitting such an item over say, std ported manifolds???

 

i have installed one of these on a USDM car and while there were skeptics this unit actually works, it will rob you of some spool time but the powerband is smooth and flat and 5500-7200 just FLYS!! the car that this went on Has a PE1820, Samco Inlet Hose, Stock Air box w/ K&N, Turbo XS Turbo Back, no cats, TXS MagnaFlow muffler, STi 565cc Injectors, Supra Twin Turbo Pump, TXS/Hyperflow TMIC, TXS UTEC...this car on 93 octane(approx 92 Ron IIRC) made 311 WHP. On C16(116.5 octane) w/ a nitrous express N-Tercooler it laid down 363 WHP. Now this was all at 20.5 psi...a lot of people were amazed at how linear the power band was and how smooth it was, before it used to be choppy and harsh. The same people say headers aren't worth the money but this car has the second highest pump gas WHP numbers to date. the header was also port matched and polished by myself before it went into to meet the turbo inlet side of the PE1820(which is massive i might add). I did have a fitment issue at first with it hitting the subframe, it would knock on initial acceleration, but they have supposedly remedied this issue.

This same car with the pump gas map laid down a shocking 12.4 @113 spinning the stock clutch the whole way. After getting an ACT in place and then hitting the track 2 weeks later they had so much VHT down on the strip that the tires just stuck @ 4500 RPM and 1st gear ended up in pieces. the first run before that we were working to avoid Det(had been picking it up all morning, approx 40 degrees Farenheit) and on 100 octane the car had run a 12.42 @ 116 but with a horridly bogged launched and a 60ft time of 1.88(normally pulls 1.8's flat or 1.75's). Well now that they trans is going together we shall see what the car is capable of. Can't wait for spring

jeremy

[Edited by Hndatch627 - 12/19/2002 9:51:43 AM]

 

the collector looks fine to me, here it is in another picture:



Paul

 

Looks a bit better from that angle
But I think a key bit - as in the 'result' post above - is that it may almost require a bigger-than-standard turbo. As most are, it's set up to work better at higher rpm (especially with the 4-1 design), and the MY99 doesn't exactly have any high rpm.
As mentioned in an earlier thread - the header should be virtually thought of as part of the turbo. This unit seems to work well with a PE1820, which is pretty far removed from a TD04!

 

They look like another copy of the HKS design, this time with the vital expansion joint.

Only difference that I can see from the pics is that the pipes look like they are a slightly smaller diameter, so I can imaging that would improve the spool up a little over the standard HKS.

Price is spot on, expecially if the Stainless!

I've been running th HKS on my car for alittle over a year now and I have been very happy with them.

 

Still do not know or it wil fit a classic Impreza

 

Should fit, yes. At least, it fits an ej20 apparently, and I think (!) that's both - old & new.

 

what exactly is the EJ20

 

its the code number for the engine in your car. AFAIK EJ is the series of the engine the 20 stands for 2 litres.

So if you see EJ25, then its EJ series and 2.5 litres

 

rallycollin is selling a version 5 EJ20 block so i think the haeders are ok for my car

 

EJ20=2.0 Litre
EJ20T=EJ 2.0 Turbo

as far as i know they will fit the classic impreza, hell they'll most likely fit better(like i said the one hit the subframe on the new age car). I can't remember which but i THOUGHT i remember someone saying that the GC8/GM8/GF8 body had a slightly differently clocked turbo, but i think that all turned out to be hearsay. i know they will fit a new age car, but trying them on a classic has the chance of being well, completely experimental.

jeremy

 

is it advisable to fit this header without the up-pipe or do you need it for the torque improvements

 

steveBT you could fit it w/o the up-pipe IIRC but i am not positive if it is a direct replacement(i blieve it is) the only issue i would forsee is that the up-pipe flanges are fairly well matched so that the up-pipe actually acts as more of a collector for the exahust, going to a smaller diameter up-pipe is going to re-introduce turbulence into the exhaust. in factory trim the up-pipe has an opening slightly larger then the turbo inlet. IIRC it's got a 2" inlet into the turbo, and thats what the up-pipe has, i just happened to port the one that i did...IIRC it's 2.25" pipeing.

jeremy

 

thanx mate youve cleared me of a lot of issues

 

I fitted the HKS manifold, which doesn't come with an up pipe, and then a few weeks later my original up pipe split...personally, if your going to the trouble, do the whole lot, it'll be worth it in the long run

 

already sorted! ordered the headers and they come with the uppie as standard should have in about 3 weeks and its only costing £400 delivered to my door, and they are an hks carbon copy

 

Nice Are these the Ion Performance headers ?

Andy

 

dont know join a group buy on an american forum