What does the J's Racing T-REV actually do?

The J's Racing T-REV is a one-way reed valve on the engine's breather line. It lets blow-by gas pulsation vent crankcase pressure out while blocking backflow, holding the crankcase in reduced pressure. Lower crankcase pressure means less pumping loss, so the rotating assembly moves with less resistance.

What will I feel after installing it?

On the FL5, J's Racing cites better throttle response in the low and mid rpm range, smoother upshifts and downshifts, and a noticeably lighter shift feel. It is a refinement part: the whole drivetrain feels freer rather than adding peak horsepower.

What is different about the BP version?

The BP is the next-generation T-REV with a newly designed bypass system and a decompression setting micro-tuned for the K20C engine. J's Racing states it achieves an effect on the FL5 that the conventional model could not.

Is it hard to install?

No. The unit is a bolt-on that connects into the existing breather plumbing and mounts compactly at the rear of the engine bay. The reed valve design works in any mounting orientation.

The valve is co-developed with Teramoto, the originator of the T-REV concept, with J's Racing tuning the pressure-adjustment body specifically for each vehicle model, in this case the FL5's K20C.

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BP PRICING DIFFERENCE

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Description

J’s Racing T-REV BP Crankcase Pressure Control Valve for FL5 Honda Civic Type R [TRBP-L5]

The J’s Racing T-REV BP for the FL5 Honda Civic Type R is a crankcase internal pressure control valve, a one-way reed valve fitted to the engine’s breather line that vents blow-by gas pulsation out while preventing backflow. Keeping the crankcase in reduced pressure lowers pumping loss, so the pistons and crankshaft move with less resistance. The BP generation adds a newly designed bypass system and a decompression setting tuned specifically for the K20C engine.

Design and Performance

Co-developed with Teramoto, the originator of the T-REV, the valve uses a triangular-pyramid three-sided reed design with internal spiral-line surface formations that create a vortex for faster gas circulation, and it works in any mounting orientation. On the FL5 the claimed effects are better throttle response in the low and mid rpm range, smoother upshifts and downshifts, and a noticeably lighter shift feel. The unit mounts compactly at the rear of the engine bay as a bolt-on.

Features

Bolt-on installation at the rear of the engine bay
Claimed lighter shift feel with smoother upshifts and downshifts
Co-developed with Teramoto, originator of the T-REV
Decompression setting tuned specifically for the K20C engine
Next-generation BP model with newly designed bypass system
One-way reed valve keeps the crankcase in reduced pressure to cut pumping loss

Applications

Honda Civic Type R: FL5 | 2023-present | 2.0L K20C1 Turbo

Notes

Connects into the existing breather line; FL5-exclusive design
For questions about how the T-REV pairs with other engine upgrades, contact us

Frequently Asked Questions

What does the J’s Racing T-REV actually do? The J’s Racing T-REV is a one-way reed valve on the engine’s breather line. It lets blow-by gas pulsation vent crankcase pressure out while blocking backflow, holding the crankcase in reduced pressure. Lower crankcase pressure means less pumping loss, so the rotating assembly moves with less resistance.
What will I feel after installing it? On the FL5, J’s Racing cites better throttle response in the low and mid rpm range, smoother upshifts and downshifts, and a noticeably lighter shift feel. It is a refinement part: the whole drivetrain feels freer rather than adding peak horsepower.
What is different about the BP version? The BP is the next-generation T-REV with a newly designed bypass system and a decompression setting micro-tuned for the K20C engine. J’s Racing states it achieves an effect on the FL5 that the conventional model could not.
Is it hard to install? No. The unit is a bolt-on that connects into the existing breather plumbing and mounts compactly at the rear of the engine bay. The reed valve design works in any mounting orientation.
Who developed it? The valve is co-developed with Teramoto, the originator of the T-REV concept, with J’s Racing tuning the pressure-adjustment body specifically for each vehicle model, in this case the FL5’s K20C.

About J’s Racing

J’s Racing is one of Japan’s most respected Honda tuning houses, developing parts the hard way: on real race tracks in Super Taikyu endurance competition and time attack rather than on paper. From aero and titanium exhausts to suspension and driveline components, every product carries lessons learned from decades of racing Hondas at the limit. Bulletproof Automotive imports J’s Racing parts directly from Japan, bringing authentic, race-proven JDM engineering to enthusiasts in the US and worldwide.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

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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J’s Racing T-REV BP Crankcase Pressure Control Valve for FL5 Honda Civic Type R [TRBP-L5]

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J’s Racing T-REV BP Crankcase Pressure Control Valve for FL5 Honda Civic Type R [TRBP-L5]

Design and Performance

Features

Applications

Notes

Frequently Asked Questions

About J’s Racing

Reviews