What's the difference between RZ Stage 1 and RZ Stage 2?

Stage 1 is the ECU and TCU tune on the stock car. Stage 2 adds bolt-on hardware (COBB intakes, HKS downpipes, HKS centre pipe) that frees up airflow and removes the stock cat restriction, on the same stock turbos.

Do I need RZ Stage 1 first?

No. Stage 2 includes everything in Stage 1 — both EcuTek licences and the full ECU + TCU tune, built for the new hardware.

Why catless downpipes?

The stock cats are the single biggest restriction on the R35 after the turbos themselves. Catless flows significantly more than high-flow cats and lets the stock turbos breathe properly. Note: catless DPs are not road-legal in Australia. Track use only.

Your choice — we map for one fuel. 98 is everywhere; E85 makes more power but the stock fuel system limits how far it can go. If E85 is the goal, look at Stage 2+ — it adds the pumps and injectors to feed it properly.

How long will my car be with you?

2-3 days. Day 1 is install. Day 2-3 is dyno tuning, road tune, and validation runs.

R35 VR38DETT

Nissan GT-R R35 RZ Stage 2

COBB intakes, HKS downpipes, HKS centre pipe, and the full ECU + TCU tune. The most you can pull out of the stock turbos on the stock fuel system.

+65kW Power

Get a Quote What's Included

$10,240 Installed, inc. GST

COBB Big SF intake kit
HKS catless downpipes
HKS stainless centre pipe
Custom ECU + TCU tune — 98 RON or E85
EcuTek ECU + TCU licences

The Package

What's included

Parts, labour, and custom dyno tuning, all listed below.

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Tuning

EcuTek ECU + TCU Tune

EcuTek ECU + TCU licences included
Custom map for your hardware
TCU tune — shifts, clutch engagement, launch
Tuned on 98 RON or E85
Road tuning & QC

Intake

COBB Big SF Intake Kit

Twin sealed airboxes feeding the symmetrical VR38 layout. Restricts less than the factory airboxes and lets the turbos breathe properly under boost.

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Downpipes

HKS Catless Downpipes

Catless downpipes that remove the biggest restriction in the factory exhaust. Lets the stock turbos run boost without choking on the way out.

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Centre Pipe

HKS Stainless Centre Pipe

Larger-diameter stainless centre section joining the downpipes into a single back section. Cleans up the bottleneck between the DPs and the rest of the exhaust.

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Optional Add-Ons

Add to your package

Extras we fit alongside this package. Mention them in your quote request.

HKS Legamax Premium

Catback exhaust

Polished stainless catback that completes the full exhaust system back from the Stage 2 centre pipe. Underbody mufflers, deeper note, full HKS exhaust from turbos to tips.

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The Process

How it works

01
Get in touch

Fill out the enquiry form with your vehicle details, current setup, and what you're after. The more detail the better. It helps us prepare the right plan for your car.
02
Plan & book

We'll get back to you, answer questions, and confirm the package is right for your car. Once it's locked in we take a deposit and organise a drop-off date.
03
Install, tune & handover

Your car comes in, parts go on, and it goes straight onto the dyno for a custom tune built from scratch. We road test, verify everything, and hand it back with dyno sheets.

FAQ

Common questions

What's the difference between RZ Stage 1 and RZ Stage 2?: Stage 1 is the ECU and TCU tune on the stock car. Stage 2 adds bolt-on hardware (COBB intakes, HKS downpipes, HKS centre pipe) that frees up airflow and removes the stock cat restriction, on the same stock turbos.
Do I need RZ Stage 1 first?: No. Stage 2 includes everything in Stage 1 — both EcuTek licences and the full ECU + TCU tune, built for the new hardware.
Why catless downpipes?: The stock cats are the single biggest restriction on the R35 after the turbos themselves. Catless flows significantly more than high-flow cats and lets the stock turbos breathe properly. Note: catless DPs are not road-legal in Australia. Track use only.
98 RON or E85?: Your choice — we map for one fuel. 98 is everywhere; E85 makes more power but the stock fuel system limits how far it can go. If E85 is the goal, look at Stage 2+ — it adds the pumps and injectors to feed it properly.
How long will my car be with you?: 2-3 days. Day 1 is install. Day 2-3 is dyno tuning, road tune, and validation runs.