Why does a tuned or track-driven R35 GT-R need an oil catch tank?

As engine load and blow-by volume increase on a tuned or hard-driven R35, the factory PCV system returns increasingly oil-saturated gas directly to the intake. That oil contaminates the intake charge, reduces combustion efficiency, and over time degrades sensors and components in the intake path. The Top Secret oil catch tank R35 GT-R intercepts that gas before it reaches the intake, separates the oil and moisture out through an internal partition, and returns cleaner gas to the engine.

How does the internal partition improve on a simple catch can?

A basic catch can creates a chamber where blow-by gas slows down and some oil drops out by gravity. The internal partition in the Top Secret tank creates a more deliberate separation path, forcing the gas to navigate the partition before exiting, which gives more oil and moisture the time and space to liquefy and collect at the bottom rather than being carried through with the gas. On a high-output R35 generating significant blow-by, that distinction in separation efficiency matters.

How often does the catch tank need to be drained?

It depends on engine state, boost level, and how hard the car is driven. The integrated level gauge lets you check the fill level visually without removing the tank. On a heavily tuned R35 running track days, checking after each session is reasonable until you have a baseline for how quickly the tank fills. A stock or mildly tuned engine driven primarily on the street will fill the tank much more slowly.

Does this kit include everything needed for installation on the R35?

Yes. The kit includes the catch tank and a silicone hose set specifically routed for the R35 GT-R. No additional hose sourcing or fabrication is required. The hose routing is designed for the R35 engine bay layout, so fitment is straightforward for a workshop familiar with the platform.

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Description

Top Secret Oil Catch Tank for R35 Nissan GT-R

The Top Secret oil catch tank R35 GT-R owners running tuned engines or putting the car through track sessions need is a purpose-built aluminum unit designed to intercept the oil and moisture carried in blow-by gas before it re-enters the intake. On a stock engine at street driving levels, the factory PCV system manages this adequately. On a tuned or heavily driven R35, blow-by volume increases and the oil-laden gas cycling back through the intake starts affecting combustion efficiency and degrading sensors and functional components downstream. This catch tank addresses that by creating a reservoir chamber with an internal partition that causes the gas to slow and separate before returning to the intake, allowing liquefied oil and moisture to drop out and collect in the tank rather than continuing into the engine. The tank holds 2.0L, includes a level gauge so accumulated oil is visible without disassembly, and uses silicone hoses throughout. Aluminum construction with a mirror-finish surface and the Top Secret logo on the tank body. Available in Polished or SPL Gold.

Features

Internal partition separates oil and moisture from blow-by gas before intake return
2.0L capacity with integrated level gauge
Aluminum construction with mirror-finish surface
Top Secret logo on tank body
Silicone hose kit included, specifically routed for the R35 GT-R
Available in Polished or SPL Gold finish

Specifications

Material: Aluminum
Capacity: 2.0L
Height: 180mm
Width: 180mm
Thickness: 65mm
Finish Options:
- Polished
- SPL Gold
Hoses: Silicone

Applications

Nissan GT-R: CBA-R35, DBA-R35, EBA-R35, 4BA-R35 | 2008-2025 | VR38DETT 3.8L V6 twin turbo

Notes

Be sure to drain the tank regularly
Accumulated oil volume depends on engine condition, boost level, and driving intensity
A level gauge is included to monitor fill level without removing the tank
For tuned engines running elevated boost, check interval should be shortened relative to a stock engine

Frequently Asked Questions

Why does a tuned or track-driven R35 GT-R need an oil catch tank? As engine load and blow-by volume increase on a tuned or hard-driven R35, the factory PCV system returns increasingly oil-saturated gas directly to the intake. That oil contaminates the intake charge, reduces combustion efficiency, and over time degrades sensors and components in the intake path. The Top Secret oil catch tank R35 GT-R intercepts that gas before it reaches the intake, separates the oil and moisture out through an internal partition, and returns cleaner gas to the engine.
How does the internal partition improve on a simple catch can? A basic catch can creates a chamber where blow-by gas slows down and some oil drops out by gravity. The internal partition in the Top Secret tank creates a more deliberate separation path, forcing the gas to navigate the partition before exiting, which gives more oil and moisture the time and space to liquefy and collect at the bottom rather than being carried through with the gas. On a high-output R35 generating significant blow-by, that distinction in separation efficiency matters.
How often does the catch tank need to be drained? It depends on engine state, boost level, and how hard the car is driven. The integrated level gauge lets you check the fill level visually without removing the tank. On a heavily tuned R35 running track days, checking after each session is reasonable until you have a baseline for how quickly the tank fills. A stock or mildly tuned engine driven primarily on the street will fill the tank much more slowly.
Does this kit include everything needed for installation on the R35? Yes. The kit includes the catch tank and a silicone hose set specifically routed for the R35 GT-R. No additional hose sourcing or fabrication is required. The hose routing is designed for the R35 engine bay layout, so fitment is straightforward for a workshop familiar with the platform.

About Top Secret

Top Secret Co., Ltd. (株式会社トップシークレット, Kabushiki-gaisha Toppu Shīkuretto) is a renowned Japanese automobile tuner and parts manufacturer, founded by automotive engineer and driver Kazuhiko “Smokey” Nagata. The company is widely recognized for its expertise in tuning, aftermarket parts, body kits, and performance engineering. Top Secret’s product range includes aero components, exterior and interior parts, engine upgrades, exhaust systems, chassis, brakes, suspension, and powertrain enhancements. In addition to its products, Top Secret is also famous for its high-speed Wangan runs, as well as its involvement in professional drifting, circuit racing, and drag racing.

Additional Information

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Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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