WRX SUBARU IMPREZA STi RA TURBO HEADERS HEADER MANIFOLD on eBay (end time 14-Oct-09 23:18:52 BST)

If not then what's the benifit of spending another couple of hundred pounds on the GT Spec

 

I would also like to know what these ones are like:

Subaru Impreza 92-01 WRX STI Exhaust Manifold Header on eBay (end time 12-Oct-09 17:25:44 BST)

Not sure if you've seen them Bodski, there cheaper again to the ones above but as your post i'm unsure what they would be like. I need to buy a manifold for mine anyway so was looking at this rather than standard.

 

I've been told to stay away from ones with a Flexi pipe Dam, apparently a weak spot prone to failure

 

The GT Spec have a 4 in to 1 collector, which I recon will flow better than that design.

Anders

 

dam escort i had one of those on my uk turbo and was fine good for the money im goner buy another for my new subaru depends how deep ya pockets are mine ant lol,

 

Why such a difference in shape/design ?

cheaper one




dearer one





which one would still give the burble, both ????

 

thought the equal length headers were more complicated (more twists etc). the bottom pics looks like unequal length, not quite sure though

wiley

 

I think from what i've been told it's the Unequal one that still gives you the burble and if you fit the equal length you lose it.

I'm the same with reguards to the deep pockets (think mine must have a hole at the bottom). The flexi being weak at that price wouldnt worry me to much tbh, if it goes i'm sure another flexi wouldn't be to hard to weld into place or the slip joint type for that matter.

 

so from those pics, which is equal/un-equal ?

 

The first one is Unequal (as it says that in the Ebay addy the picture is from ) but unsure about the other, it seems a bit hard to tell from the pictures.

 

its just weird as the pic of the un-equal length ones is so different to say these hks onesbut been told these too give a burble sound,yet they seem to be equal length ???

 

Hmm, i could be totally wrong mate, thats was just from what i had been told previously. Something about the newer Impreza's not having the same burble due to having an equal manifold design. As said tho it could be complete tosh, might be worth a thread of it's own to get the right answer .

Sorry for the highjack Bodski.

 

Best staying away from the crap headers advertised on ebay unless they are genuine GT spec with receipts to prove they were first bought from a reputable garage or supplier. Why not give harvey smith a pm on here and ask him for prices on headers (ported and gt spec)

Cheers

Rich

 

You have a reason for saying this or is this just the old 'brand snobbery' thing creeping out?

Have the cheap headers (Ebay one shown here for example) ever been tested and compaired to the Stock manifolds with detramental results?

Obviously the top branded manifolds are going to have alot of time and money spent testing and developing using the proper flow bench's but if your not running say 400bhp plus then would this really be needed?

 

Yes its brand snobbery...

see how long the ebay headers last without blowing gaskets.

 

Can you explain why?
have you tried them?
is the metal a different spec to the dearer ones?
Have the flanges been pulled out of shape by the welding?

 

Seen and heard it many times and not just on impreza's with these low priced headers.

Are you selling them?

 

Most after market headers will crack at some point, the quality just depended how long before they do!!!

it's not unheard off for the cheap ebay ones to crack within 1,000-2,000 miles

 

No i'm not selling them but i was considering buying them as i have no manifold on mine at the moment.

Was wanting to know from a buyers view what made them different to the dearer ones, be it weld quality (which i fixable at no extra cost by rewelding) or if it was a lesser quality stainless? Obviously if they were the same bore and shape as the dearer ones then i wouldn't imagine they would flow any different.

I wouldn't mind having to do a little bit of welding to save myself a couple of hundred if thats all there is to it but what i'm trying to find out is if thats the only problem? Are they cracking at a welded joint or are they cracking on the pipes themselves?

 

I think Andy F has tested some of the Ebay ones :

AndyForrestPerformance

 

Makes interesting reading

 

I bought some of the cheap headers off ebay and put them on my 1999 turbo 2000 along with a walbro fuel pump and k+n insert and was getting 297bhp and 320 torks.had them for two years with no trouble at all.They were unequal but the burble was crap compared to standard headers sounded good when thrashed.

 

Thanks Arthur, just had a read at that. I take it Andy was testing these on his car thats used for events and not a daily driver? (maybe Andy could answer this himself?)

Wonder if they would do any better in a daily driver as i would imagine as with alot of other components on the car that the stress' enforced on them would be considerably less.

Are there any disadvantages to fitting tubular manifolds to a car running less than 300bhp?

Thats one of the worries i've had about the after market headers Wayne as the sound from the exhaust is one of the main things i love about the Subaru.

 

Drop Harvey on here a message or an email as he has extensive knowledge on different headers and he is very helpful.

On a purely personal view I am going for ported headers as opposed to tubular as they help spool up, something important with FMIC and I am only aiming for 350.

 

have had a set of the cheap headers on my car for about 4 years, they have the flexi up-pipe, have had no problem with them whatso ever, the one thing they did do was to increase the torque by a considerable amount according to a rolling run. p.s have never and still dont leak(he says touching wood)

 

have had a set of the cheap headers on my car for about 4 years, they have the flexi up-pipe, have had no problem with them whatso ever, the one thing they did do was to increase the torque by a considerable amount according to a rolling road run. p.s have never and still dont leak(he says touching wood)

 

sorry double post

 

triple

 

the first set are not worth considering.. too many times have I seen failed flexi joint on them..

the second sent are unequal and look link gt spec or as referred to as gt spec as they were the first comany to sell them and they work well .... but don't use the gaskets.. they last about 5miles.. get proper oe gaskets.

Simon

 

Cheers Simon. Think i'm gonna dig deep and go for "Proper" GT Spec's now M8, can't be arsed with all the risks that seem to go along with the Ebay ones