Best upgrades for your turbo Subaru | JDM WRX STI with Stage 3 Package

2008 WRX STI (GRB) with PBMS Stage 3 Upgrade & Tune Package. We believe these are one of the best upgrade packages as it enhances the entire vehicle, for an affordable price.
See the mod list below 👇
All parts, servicing and tuning can be performance by Possum Bourne Motorsport. Check out www.possumbournemotorsport.com for more information.
Mod List:
2008 WRX STI (GRB) 2.0L JDM
Stage 3
High Flow 3 Inch Downpipe (PBMS)
High Flow Fuel Pump (Raceworks)
Fuel Filter Replacement (OEM)
PBMS Tune Package
High Flow 3 Inch Exhaust System (Xforce)
Additional on this vehicle
Air Pump Delete
One Step Colder Spark Plugs
ECUTEK Racerom Software
ECUTEK Transmission Tune
Power: 231kw on 1.5bar (22psi) - recommended maximum boost level to prolong the life of Turbo.
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[@renevermeer6619]

Thank you so much, Patrick and the PBMS team! Car is so much fun now and just drives so much better in general. Legends!

[@PossumBourneMotorsport]

Thanks mate, loved working on this for you!

[@curvaholic]

Exact concept of what I am looking for...same car trim and color ironically

[@PossumBourneMotorsport]

They're such a fun car, and with a few simple mods they're even better 😉

[@bunnyboy324]

Just waiting on my air intake to arrive and I’ll be giving you guys a call as soon as it arrives

[@PossumBourneMotorsport]

Can't wait to hear from you - Pat

[@igorushka]

In USA this stage makes 350whp. But we have 2.5L engines.

[@PossumBourneMotorsport]

Hey Igor - the 2L makes pretty the same power as the 2.5L engine when it has the same modifications. The main difference is the 2L engine revs out to 7500rpm+, so it has a wider powerband with a stock-sized turbo. We get both the 2L JDM vehicles and the 2.5L versions in New Zealand, so we're pretty lucky. The dyno power figures between Australia/New Zealand and the USA are well known to vary, with the dynos we commonly use here reading 10-15% lower, which accounts for the difference between you you'd normally see, and what we made on this vehicle.

[@michaeldaly7688]

@@PossumBourneMotorsport the 2L are a stronger motor though? (From what I've read)

[@PossumBourneMotorsport]

@@michaeldaly7688 the 2L STI engines are known to be a little more reliable over the long term, though they do also share many of the same weaknesses. In stock, or lightly modified form, the 2L would definitely be the pick, but when you're building engines and doing big mods, it's not so clear cut.

[@TimberWulfIsHere]

@@PossumBourneMotorsport the 2.5L engines make a tad more torque with the same mods.

[@astyn3117]

How much for a Stage 3 Packaged WRX ? 😅

[@livelifeoutdoors182]

Awesome, Im a kiwi living in London and imported a JDM STI hatch over here from Japan recently (I must be the only Subaru hatch owner in my area). I have an INVIDIA R400 catback exhaust, aftermarket panel filter, aftermarket fuel pump, HKS BOV and a tune. Making 328HP on Dyno. Would the downpipe make much more of a difference? Is there anything else I can do to make it a bit more fun? eg. different turbo?

[@PossumBourneMotorsport]

A downpipe would definitely make a significant difference - the small diameter and the restrictive cat choke exhaust flow, power and response. We typically do the downpipe as one of the first mods on any Subaru. A cold air intake will net a few HP, but to go to the next level you'll need to look at a turbo, fuel pump, injectors, and re-tune. Take a look at our stage 7 videos - which will give you an idea of what's involved. But failing that, some good whiteline suspension products and/or quality shocks will make it funner to drive too. kzbin.info/www/bejne/iZ2vaZWZi7WbgsU or kzbin.info/www/bejne/eWSbga2saqmVaKc

[@livelifeoutdoors182]

@@PossumBourneMotorsport which downpipe would you recommend? I currently have the R400 catback exhaust

[@livelifeoutdoors182]

@@PossumBourneMotorsport just had a look at your products. I'll be coming back to NZ in December so I'll grab some parts eg. Catted downpipe. Do you have plenty in stock or is it best to pre order? Cheers

[@PossumBourneMotorsport]

​@@livelifeoutdoors182 we generally have a few in stock, however, with local and international supply chain issues, we never know what will happen. We should have them, but if you want to guarantee one, and at the current prices, I recommend ordering one in advance.