People, I need advice or some experience from those who have fitted xforce E/L headers to their cars, I am considering this only on the advice that you don't loose the boxer noise with the headers mentioned above, but I don't understand as everything I have ever heard is that e/l headers kill the boxer noise. I have had an XForce TBE fitted on the car for 2 years now and am very happy with it, so quality is not in question, I just don't want to spend coin on something that may rob me of that which I love, Boxer joy!
Cheers.

To keep the boxer rumble you need unequal length. They give you more low end torque too. Buying a subi I love the noise, so I wanted to keep it. Sacrificing something like the boxer rumble for a bit more top end HP wasn't worth it IMO

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2005 WRX STI

Ask Slap Dash, I think he has them on his car.

Yes, you will lose the rumble but you will also get a few more horses.
It is a personal preference really. I am definitely getting them next.

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02STi - Vipec, Oval Varex, APS CAI with K&N Filter, Walbro 255L, 53MM Koyorad & STD Coilover

19.5psi tune 271.6HP@6000 351.3NM@4700

Equal length for power/efficiency, unequal length for rumble.

Personally I don't mind either for sound, but if you love the boxer rumble, keep unequal length headers.


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Slow is smooth and smooth is fast.

I have equal length and still have rumble at idle...

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Air is for pussies.

Alike to Astralex I still have a Boxer rumble (Not as loud & obnoxious as Unequal tho.) Xforce's new design apparently is rated a Semi Equal length. I also have the benefits in terms of power/efficiency per said above , Not needed but I would also recommend ceramic coating them

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2018 Nationally Accredited Silver CAMS Photographer

Having a modern day PC without an SSD is like hiring a hooker for hugs.......

There are un-equal extractors available if u want to gain a few ponies and keep the rumble. I'll be going Tomei when I get around to it.

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"ALLPAWS" 2014 WRX RS 40 - modding very slowly.
2002 Mitsubishi Airtrek Turbo R - Ralliart Edition (daily)
2010 Nissan GT-R - when the Missus let's me drive it :)
Crotch Rockets . . .

I've got equal, sounds like a Honda.

Thanks for the comments guys, interesting to hear that the new xforce gear is regarded as semi equal, is this why there is the claim that you retain the rummble? do Xforce do UEL headers? I should have mentioned my WRX is a bugeye so mainly just need to get rid of the stock up pipe but was told leakage was a problem when fitting aftermarket uppie to stock manifold!

David, I'd rather pay the extra for Tomei as I have personally installed and used their other bits and was a joy to fit. Cant say Ive had the same pleasure with non JDM aftermarket bits.

It is a good idea to get rid of the stock up pipe in a bugeye, get one with a flex joint to avoid fitting dramas.

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"ALLPAWS" 2014 WRX RS 40 - modding very slowly.
2002 Mitsubishi Airtrek Turbo R - Ralliart Edition (daily)
2010 Nissan GT-R - when the Missus let's me drive it :)
Crotch Rockets . . .