Hi all,

I'm not Australian but have spent 5 university years in Perth so it kinda feels like a second home. I have a 2013 GR sti and decided to join this forum as the information here would be more applicable to my Asian Domestic Market car as well.

So far I have installed an AOS, mudflaps and a set of Defi's waiting to be installed at the end of the year. I've started looking at catback system but here is where I get confused. After some research I have to either go full JDM turboback or USDM turboback due to the different downpipe length between the JDM and USDM aftermarket, however at this stage I am only interested in getting a catback, the Tomei titanium single tip to be exact. Does anyone know if I were to purchase any USDM catback system, will it bolt on without any issue on the stock downpipe, car is rhd with ej257 too so I have no idea the stock downpipe on my car is JDM or USDM length but rallysportdirect cant confirm fitment.

Thanks

Welcome. My 2cs is since jdm is ej207, so the length is different to 257. Urs would be usdm, but if u get usdm turboback (lhd), it might not fit, since the steering column would hit the pipe. Tomei catback is great, but why not quad outlet?

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MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR

Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport

Tomei - Expreme Ti Catback Exhaust Hatchback (WRX 2011+/STi 2008-14) - Tomei

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Bye bye betty blue. Hello F6.

Ty for reply. Yes I just confirmed that my stock exhaust system is the same as the USDM dimension by jacking the car up and had a look at the 2 cats. I initially wanted to get a dump pipe mated to stock catback, an EBCS and an etune but still looking for a reliable tuner and the wideband settled first.

Sadly the 2 quad tip catback that I like is the HKS and the Blitz which is imo overpriced and being JDM I would have to get the accompanying dump pipe.

Thanks for the link. Its weird Tomei produced 2 versions of the same catback but only one version of dumppipe.

Sedan and hatch bro.

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Bye bye betty blue. Hello F6.

Tomei Expreme Ti Titanium Catback Exhaust Subaru Sedan WRX 2008-2015 / STI 2011-2015 440018 at RallySportDirect.com

I bought this and just installed last week, easy to install on a hoist. USDM option for the 2.5L. Very happy with it. Not too loud on idle or cruising, but opens up to a nice rich throb when u put ur foot down.

http://www.perth-wrx.com/vb/general-...s-40-rs40.html

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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 have seen hks catback fitted to ej257 with certain dump pipe, if u r keen will find the brand for u when I get home.

Otherwise, maybe get a ultrex or xforce turboback and weld a titanium tip on it. Should be a cheapest way.

using the Perth-WRX mobile app

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MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR

Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport

They have 2 different versions for each body style but only 1 version of down pipe

Ty. Thats the confirmation I needed