GT1R CNC Air Oil Separator with Drain Back / Catch Can Kit Fits Nissan R35 GTR (VR38DETT)GT1R-AOS-KIT


Buy now and pay later with...

Zip now, pay later

or 4 interest-free payments of $337.25 with More info

What is Afterpay?

Afterpay allows you to purchase from online store and pay later in 4 easy interest-free instalments.

How does Afterpay work?

To pay with Afterpay:

  • Add your items to the cart

  • Select Afterpay as the payment option at the checkout

  • Signup or use your existing Afterpay account

  • Once approved, JustJap will dispatch your order

Is there any interest on the amount paid?

No, there is no interest payable by you

Is there an order limit?

Yes, the maximum purchase amount using Afterpay on JustJap is $1000.

What are other terms and conditions I need to be aware of?

Full terms & conditions are available at

How often is repayment?

Afterpay offers your order to be paid in 4 instalments with repayment automatically occuring every 2 weeks. 

How do I sign up for Afterpay?

Select Afterpay as a payment method (or visit the website).

You can register as you complete your purchase.

How do returns work with Afterpay?

Merchants will be able to initiate all eligible refunds on your behalf. Once completed, your refund will be applied to your order.

Does Afterpay charge interest?

There is no interest payable by you if you place an order using Afterpay.

Can I place an Afterpay order with you over the phone?

Afterpay is available as an online payment method and requires login credentials for authorisation. Our team members or merchants are unable to place an order on your behalf.

Where can I find out more about Afterpay?

If you would like to know more about Afterpay, visit the Afterpay website for a comprehensive list of FAQs & terms. Afterpay’s Privacy Policy which can be found at privacy-policy

Thanks for registering your interest. We'll let you know when this item is back in stock.

Quantity exceeds our current inventory for this item.
Additional items will be placed on backorder.

1In Stock - Kirrawee, NSW

Ships in 1-3 business days

Available for back order

Lead time 7-10 Days

Click & Collect available from Kirrawee, NSW



For orders dispatched from/within Australia we use the services of, Border Express, Australia Post Registered & Express, and local couriers for Sydney Metro deliveries.

Please note that in some circumstances we are not able to use your chosen shipping method.

For international orders we use the services of DHL/UPS. Please note that International Orders require longer processing times and may take up to 1-2 days to ship if the item is in stock.

Link has been copied to clipboard!


The Problem

Even in the stock configuration you’ll find the turbo inlets and intake runners with a nice film of oil on them.   While this ensures your aluminum compressor wheels don’t rust, it does nothing beneficial for performance!  Oil in the intake tract will lead to oil deposits on valves, an oil film on the inside of the intercooler that affects cooling efficiency, and if bad enough, can potentially cause detonation.  This problem gets compounded when horsepower is increased, engines are rebuilt with looser clearances (from forged pistons), ethanol fuels are used which hurts ring seal, etc.  As you increase the amount of air coming out of the engine from blowby, you also increase the amount of oil carried out with it.  In the GTR, this usually results in an oil spraying blow off valve and a messy engine bay, along with the mentioned negative affects.

The Solution

We designed the AOS with detailed internal passages and a two stage separation system. The first separates the larger oil droplets from the air and the second stage separates the remaining smaller droplets from the air.  The result is a fully recirculated maintenance free system, with no oil smell.  The oil that is extracted is returned back to the engine so you never have to worry about emptying a can or an overflowing can emptying itself into your turbo inlets and engine bay.  Systems that don’t recirculate will emit a smell that your climate control system will recirculate into the car, that doesn’t exist in the stock form or with our system.

The kit consists of a 3 piece CNC AOS, anodized black and engraved with the GT1R logo.  The AOS is sealed with Viton o-rings and all ports are AN o-ring boss ports.  We include a 6AN check valve in the bottom of the AOS to allow oil to drain back and stop crankcase pressure from feeding the AOS from the bottom, where it’s designed to drain.  The AOS is mounted to the engine using supplied stainless steel hardware and a CNC aluminum mounting bracket.  A complete installation kit is included with pre-assembled lines using Redhorse Products black anodized crimp hose ends and black AN hose.   Following the supplied instructions, installation can be done in less than 2 hours by a first time installer with a few basic tools, including the oil drainback system.



Availability 7-10 Days



Your Cart

Your cart is currently empty.