Which GD models do you tune?

Every one. EJ207 STI, EJ205/EJ255 WRX, plus the JDM Spec C and RA cars when they show up. Bug, Blob, Hawk Eye. All the same workshop.

Can you tune a chipped or aftermarket ECU?

Yes. EcuTek on factory ECU is what we run most days. We'll also tune AEM, Link, Haltech, or Cobb if your car's already on one. Tell us what's in it when you book.

How much power can a GD safely make?

On a healthy stock motor with the right supporting mods, 250–280kW at the hubs is a sensible street ceiling. Past that you're into forged internals. Different conversation, different budget.

Are ringland failures still a worry?

On a tired EJ255 or a badly-tuned EJ207, yes. We compression-test before we tune anything we don't already know. Conservative AFRs and the right oil get a healthy motor a long way. If the bottom end looks off, we'll tell you straight.

I've got a 2007+ STI. Is that still GD?

No. 2007 onwards is the GR gen. Different page, same workshop.

EJ PLATFORM SPECIALISTS EJ207 / EJ255 • 2000–2007

Subaru WRX / STI (GD/GG)

Bug, Blob, Hawk Eye. Custom dyno tuning w/ EcuTek and full builds for the 2nd-gen WRX & STI.

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Got a different generation? See all WRX/STI generations

Packages

Performance packages

Parts, labour, and dyno tune included. No hidden costs.

RZ Stage 1

Custom build

Custom dyno tune w/ EcuTek on the factory ECU

Price on application

Custom dyno tune w/ EcuTek
Built from scratch on our Dynapack. No flash files
Optimised for your fuel and engine condition
Road tune & QC handover

Best for: Stock or lightly modded EJ owners wanting more from the factory ECU

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RZ Stage 2

Custom build

Downpipe, intake, intercooler. Bolt-ons plus a proper supporting tune

Price on application

Downpipe
Cold air intake
Top-mount intercooler upgrade
Custom dyno tune w/ EcuTek

Best for: Owners ready for bolt-ons and the supporting tune to make them work

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Custom build

Headers, catback, and clutch on top of the Stage 2 setup

Price on application

Downpipe
Cold air intake
Top-mount intercooler upgrade
Equal-length headers
Cat-back exhaust
Upgraded clutch
Custom dyno tune w/ EcuTek

Best for: Most you can safely get out of a stock-bottom-end EJ

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RZ Stage 4

Custom build

Stage 3 plus a Blouch 1.5XT-R turbo upgrade

Price on application

Everything in Stage 3
Blouch 1.5XT-R turbo
Re-tune w/ EcuTek

Best for: Streetable big-single. Strong response, real numbers

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RZ Stage 4+

Custom build

Bigger turbo with surge tank and baffled sump for track use

Price on application

Stage 3 bolt-ons
Blouch 2.5XT-R turbo
Surge tank
Baffled sump & oil pickup
Re-tune w/ EcuTek

Best for: Track and circuit cars where stock fuel and oil systems run out

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RZ Stage 5

Custom build

Forged closed-deck short block with the biggest turbo on the menu

Price on application

Stage 3 bolt-ons
Blouch 3.5XT-R turbo
Forged closed-deck short block
Surge tank
Baffled sump & oil pickup
Re-tune w/ EcuTek

Best for: Big-power builds where the bottom end has to last

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Want something custom? Get in touch →

All Under One Roof

Beyond the packages

Same building, same techs. Servicing, custom upgrades, and dyno work outside the off-the-shelf packages.

Servicing & Maintenance

We've been working on EJs since 2000. Logbook intervals, the right oil for your motor, AVCS solenoids, pre-track checks. By people who tune these engines every week.