Collins FR-S BR-Z FT-86 GR-86 Tilton Hydraulic Release Bearing Input Shaft Cover Adapter

The factory clutch fork and pivot ball assembly in the TL70 transmission is a known weak point. Once clutch clamp loads increase, the OEM release mechanism becomes one of the first components to fail—cracked forks, broken pivot balls, inconsistent clutch release, and unnecessary downtime.

Our Tilton Hydraulic Release Bearing (HRB) Input Shaft Cover Adapter eliminates those failure points entirely.

Designed specifically for the Toyota GR86, Subaru BRZ, Scion FR-S, and Toyota GT86 equipped with the TL70 transmission, this system replaces the factory mechanical release mechanism with a Tilton hydraulic release bearing, creating a stronger, more consistent, and race-proven solution for high-performance applications.

Whether you're running an aggressive single-disc clutch, building a dedicated drift or road race car, or preparing for a custom twin-disc setup, this adapter is built to handle it. Thanks to Tilton's extensive range of Saab styled hydraulic release bearings with multiple piston heights and bearing diameters, this system is modular and can easily be configured for a wide variety of clutch stack heights and future upgrades.

This isn't a universal adapter or a one-size-fits-all solution.

Every dimension was developed from OEM Toyota engineering data, validated through real-world vehicle testing, and refined to ensure perfect alignment with the transmission input shaft. Each adapter is CNC machined on Japanese manufacturing equipment using dedicated fixtures to maintain exceptional concentricity and repeatable accuracy.

The result is a component you can trust whether you're swapping a high revving V8, banging gears at the track, or putting thousands of hard street miles on your build.

Performance doesn't have to come at the expense of drivability.

Our design uses a 54 mm contact surface on the OEM pressure plate to create a mechanical advantage over the factory release system. The result is an incredibly light, smooth clutch pedal—even with pressure plates that would normally require significantly more effort.

Many customers describe the pedal feel as similar to a stock '90s Honda Civic, giving you outstanding clutch modulation without sacrificing holding power.

Features:

• Eliminates the factory clutch fork and pivot ball assembly.

• Removes one of the TL70 transmission's most common failure points.

• Works on most RX8, and J160 transmissions as well.

• Designed for the Toyota GR86, Subaru BRZ, Scion FR-S, and Toyota GT86.

• Compatible with most all Tilton "Saab" bolt pattern Hydraulic Release Bearings.

• Supports high-clamp single-disc and custom twin-disc clutch systems(requires piston/bearing hieght change in some cases).

• Precision CNC machined on Japanese equipment.

• Engineered using OEM Toyota data for precise fitment and alignment.

• Lightweight, durable, and built for serious motorsport use.

• Improved clutch consistency, smoother engagement, and dramatically reduced pedal effort.

When reliability matters, the factory release system simply isn't enough. Upgrade to a hydraulic release bearing and eliminate one more weak link from your drivetrain with a solution engineered for racers, tested in the real world, and built to handle whatever you throw at it.

*Any questions or to check if in stock please give us a call at 803-792-7189*