74 replies to this topic

[acres]

will the gen1 headers bolt straight up to my gen2?

If it is 2.5L then no.

For my 2.5 I used a set of oem gc8 wrx headers. Gave out an awesome sound. This will only work on gen2 dohc 2.5's though as they have a similar exhaust setup to the turbo cars.

[Dylan]

will the gen1 headers bolt straight up to my gen2?

What model gen2 have you got?

If it's a 2.2 L motor (GX, or LX) - yes. If you have an RX (2.5L) then no, the gen2 2.5L exhaust system is quite different to any of the other NA exhaust systems.

Aek will these headers fit my obk? If not are you aware of which ones will? Cheers mate

They should do yes, should be the same exhaust run as the gen1.

If it is 2.5L then no.

For my 2.5 I used a set of oem gc8 wrx headers. Gave out an awesome sound. This will only work on gen2 dohc 2.5's though as they have a similar exhaust setup to the turbo cars.

Very very interesting. I've always wondered if turbo headers would bolt straight up - good to hear from someone who has done it. I think the Gen2 2.5L exhaust setup is pretty stupid for a NA motor.

[camoshop]

If it is 2.5L then no.

For my 2.5 I used a set of oem gc8 wrx headers. Gave out an awesome sound. This will only work on gen2 dohc 2.5's though as they have a similar exhaust setup to the turbo cars.

i always wondered about if this would work , might do something similar with mine , they have gc8 extractors on ebay for around $400

http://cgi.ebay.com/...28304&viewitem=

[acres]

Cam, don't use aftermarket headers as alot of them (like the ones you linked to) also use an aftermarket uppipe and the bolt patterns are different. Just need to use genuine headers as they bolt straight up to the up pipe bit on the gen2. I remember that I couldn't find any at the wreckers so I just bought a set of some dude on rexnet. Think I only paid about 60-70 bucks. (I reckon 400 would be a waste of hard earned dosh). The only problem is the gc8 headers do not have a threaded bung for the o2 sensor. You will need to get a new bung welded to the uppipe bit.

Agree Dylan, it is a bit of a silly exhaust, makes me wonder whether the engineers were rushing the design of the dohc motor so just used the turbo crossmember and altered the exhaust to suit.

[Scuba-Roo]

I've got a spare set or two of g1 headers in my little parts collection, if i get time this week i'll swap them onto my impreza and see what i get

But from what i can remember my impreza sounds better now then my liberty did with the same muffler, and pipe size.

[Sam]

Looking to sell a set scuba-roo? As long as they fit a ej25 like mine!

[AussieTemplar]

I've got a spare set or two of g1 headers in my little parts collection, if i get time this week i'll swap them onto my impreza and see what i get

But from what i can remember my impreza sounds better now then my liberty did with the same muffler, and pipe size.

Looking to sell a set scuba-roo? As long as they fit a ej25 like mine!

Ditto. Do want Gen1 headers for my EJ25

[Scuba-Roo]

Might be able to find a spare set or two... get the feeling i chucked em all but one set away.


Just got a mates ***** of an RS lib gearbox to remove, and i'll get on it

[Sam]

Sweet mate if you've got a couple I'm more than interested just give us a bell. Sam

[Josh 95LIB]

What model gen2 have you got?

If it's a 2.2 L motor (GX, or LX) - yes. If you have an RX (2.5L) then no, the gen2 2.5L exhaust system is quite different to any of the other NA exhaust systems.

I have a GX. Might look into getting some.
Cheers

[Scooby-Doo]

So could I possibly get some gen1 headers and turf them onto my gen3 gx??

Cheers,
Nick

[Scuba-Roo]

Probably not

http://www.subyclub....aru-na-headers/


Mine are in the shed doing nothing if you'd like to try em out.

[Scooby-Doo]

Thanks mate but alas im down in good ole melbourne :s haha..

So id be better off just getting some of those borla replicas and getting them heatwrapped\cermaically coated (cost?)..

[Scuba-Roo]

Yeah do that. just heat wrapped, unless you feel like paying around $300 for ceramic coating, I'm fairly sure that's how much my mates were on his STI

[Sam]

What is heat wrapping? Where do you get it done? Can you do it yourself? Approx cost?

Cheers

[RX25SE]

Not sure of the benefits of heat wrapping the headers on a N/A.

When I fitted my Borla replicas the performance gain was minimal so I can't see much in heat wrapping.

[Scooby-Doo]

Isnt the heat wrapping there to stop the excess heat radiating out to the cars more delicate bits...(reat something earlier about a boot vracking or somesuch due to the heat?)...as above what sort of price are we looking at for heat wrapping and is it diyable?

[RX25SE]

To reduce radiant heat, yes.

My LH rack boot is a little melted but I'll make a small heat shield for that....one day.

You can buy heat wrap tape (it's like a bandage) from race shops or maybe Bursons/Repco etc.
You simply bandage up the pipes and finish the loose ends with wire.

[Alex]

Yeah it's DIY'able. Very.

Just a matter of soaking the roll in water, and applying it wet. You can attach the loose ends with wire, metal cable ties, or a hose clamp. Wear gloves too. Picking fibreglass out of your hands is not only bad for your health (possible carcinogenic), but it bloody hurts your hands for days.

A roll will set you back northward of $60-70 a roll.

I don't see the need of it for an NA however, as you're not seeing under bonnet temps like you would a tuned NA or a turbo.

The flipside of this stuff is that it can be a little dicey to use. It's a fire hazard, in that if oil drops onto it, not only does it stink for days on end, it creates a medium for an underbonnet fire.





But what would I know... I'm a nurse.

[Scuba-Roo]

I believe people heat wrap NA headers to reduce the tinny sound they make as their constructed of poor quality thin material.