-18%
Click to zoom in
Direct-Fit Release Bearing for the FA20 Clutch System on BRZ, FR-S, and 86
The ACT RB004 is a high-quality direct-fit release bearing for the 2013-2020 Subaru BRZ, 2013-2016 Scion FR-S, and 2013-2020 Toyota 86. It meets or exceeds OEM specifications and is engineered to work seamlessly with ACT clutch discs and pressure plates on the FA20 platform. The RB004 is a self-aligning sealed ball bearing that installs without modification, using the OEM fork and pivot as-is. Any time the transmission is out for a clutch replacement, the release bearing should be replaced as a matter of course. A worn or failing release bearing is one of the most common causes of clutch noise and inconsistent pedal feel, and the labor cost to replace it separately later far outweighs the cost of doing it during the clutch service.
Key Features
- Direct-fit replacement meeting or exceeding OEM specifications
- Self-aligning sealed ball bearing for consistent fork contact and quiet operation
- No snap ring groove required for this application
- Steel construction for long service life
- Compatible with ACT clutch discs and pressure plates on the FA20 platform
- Backed by ACT's industry-leading warranty
Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2013-2016 | Scion | FR-S | Base |
| 2013-2020 | Subaru | BRZ | Limited, Premium, Series.Blue, Series.HyperBlue, TS |
| 2017-2020 | Toyota | 86 | Base, GT, TRD Special Edition |
Specifications
| Detail | Value |
|---|---|
| Part Number | RB004 |
| SKU | ACTRB004 |
| UPC | N/A |
| Material | Steel |
| Bearing Type | Ball |
| Bearing Shape | Round |
| Inside Diameter | 1.308 in |
| Self-Aligning | Yes |
| Sealed | Yes |
| Snap Ring Groove | No |
| Mounting Tabs | No |
| Weight | 0.5 lbs |
What's Included
- 1 x ACT RB004 release bearing
Related Parts on Our Site
- ACT 3000504 — Perf Street Sprung Disc
- ACT ACT3000506 — Performance Street Sprung Disc
- ACT 6224218-1 — 6 Pad Sprung Race Disc
- ACT AT90 — Clutch Alignment Tool
About ACT
Advanced Clutch Technology (ACT) has designed and manufactured performance clutch components in the USA since 1991. ACT's clutch accessory lineup, including release bearings, alignment tools, and pilot bearings, is engineered to match the tolerances of ACT pressure plates and discs for a complete, reliable clutch system build.
Frequently Asked Questions
What is the ACT RB004?The ACT RB004 is a direct-fit, self-aligning sealed ball release bearing for the 2013-2020 Subaru BRZ, 2013-2016 Scion FR-S, and 2013-2020 Toyota 86. It is designed to meet or exceed OEM specifications and pairs directly with ACT clutch disc and pressure plate combinations on the FA20 platform.
Do I need to replace the release bearing when doing a clutch job?Yes. Any time the transmission is removed for a clutch service, the release bearing should be replaced regardless of its apparent condition. The additional cost of the bearing is minimal compared to the labor required to access it again if it fails shortly after a clutch install.
Is this bearing self-aligning?Yes. The RB004 is a self-aligning bearing, which means it automatically compensates for minor fork angle variations to maintain consistent contact with the pressure plate diaphragm spring, reducing noise and uneven wear over time.
Does this fit with the OEM fork and pivot?Yes. The RB004 is a direct-fit bearing designed to use the existing OEM fork and pivot without any modification. No adapters or special hardware are required.
Is this bearing compatible with ACT Heavy Duty and Xtreme pressure plates?Yes. The RB004 is designed to work with ACT pressure plates on the FA20 platform, including both Heavy Duty and Xtreme series pressure plates.
Will this bearing work with a stock pressure plate?The RB004 is a direct-fit OEM-spec bearing, so it is dimensionally compatible with the stock pressure plate as well. It is an appropriate replacement bearing even if you are not upgrading the rest of the clutch system.
What causes a release bearing to fail?Release bearings fail from age and mileage, riding the clutch pedal (which keeps the bearing constantly engaged), overheating from clutch slip, or contamination from oil leaks. Symptoms include chirping or grinding when depressing the clutch pedal that disappears when the pedal is released.
What is the warranty on this bearing?The RB004 is covered by ACT's industry-leading warranty program. Contact ACT directly or refer to the documentation included with your order for full terms and conditions.
Installation Instructions
- Remove the transmission to access the clutch and release bearing assembly.
- Remove the old release bearing from the input shaft sleeve and fork.
- Clean the input shaft sleeve and fork contact points. Inspect the fork and pivot for wear or damage.
- Apply a thin film of high-temp grease to the input shaft sleeve where the bearing slides.
- Slide the new ACT RB004 onto the input shaft sleeve and seat it onto the fork clips or retaining tabs.
- Reinstall the clutch disc and pressure plate using the ACT AT90 alignment tool, then reinstall the transmission.
- Verify smooth clutch pedal operation through several engagement cycles before returning the vehicle to service.
WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.
ACT
ACT (Advanced Clutch Technology) is a trusted leader in high-performance clutch and drivetrain solutions, engineered for enthusiasts, racers, and high-torque performance builds. At Black Ops Auto Works, our ACT collection features a wide range of ACT performance clutch kits, pressure plates, clutch discs, flywheels, pilot bearings, and alignment tools designed to handle aggressive driving, increased horsepower, and track-level abuse. Manufactured in the USA and proven in motorsports worldwide, ACT products deliver consistent clutch engagement, superior heat resistance, and long-term reliability. Whether you’re upgrading a street-driven vehicle or building a race-ready setup, ACT clutches provide the strength and precision needed to put power to the ground. Our ACT lineup supports many popular import and domestic platforms, including Subaru, Mitsubishi, Scion FR-S / Subaru BRZ, BMW, Ford, Audi, Volkswagen, Jeep, and Hyundai. From HD Performance Street clutches to XT and race-sprung c...
View ACT Products
Drivetrain
Shop drivetrain parts and accessories at Black Ops Auto Works for differentials, axles, driveshafts, clutch kits, flywheels, flexplates, shifters, transmission components, ring and pinion gears, differential braces, differential bushings, wheel hubs, wheel bearings, U-joints, valve bodies, transmission coolers, drivetrain mounts, and performance driveline upgrades. This collection is built for street cars, drag cars, track builds, trucks, Jeeps, SUVs, high-horsepower Mopar builds, imports, European performance vehicles, and off-road applications that need stronger power delivery, durability, and reliability. Use this Drivetrain collection to find the right upgrade by vehicle platform, drivetrain layout, transmission type, power level, and product category. Differentials and ring and pinion gears support traction and gearing changes, axles and driveshafts help transfer power, clutch kits and flywheels improve manual transmission performance, transmission coolers and valve bodies supp...
View Drivetrain Products
Release Bearings
Welcome to our Release Bearings collection, where quality meets performance. Our carefully curated selection includes a variety of high-performance release bearings suitable for different applications. Whether you are a professional or a DIY enthusiast, you'll find the right product to meet your needs. Why Choose Our Release Bearings? Durability: Made from high-quality materials to ensure longevity and reliability. Optimal Performance: Designed to reduce friction and wear, enhancing efficiency in your machinery. Versatile Applications: Suitable for automotive, industrial, and other mechanical systems. Easy Installation: User-friendly designs that fit seamlessly into your projects. Featured Products in This Collection Our collection features a variety of options: Standard Release Bearings: Ideal for general-purpose use. Heavy-Duty Release Bearings: Perfect for tough environments and high-load applications. Specialty Release Bearings: Tailored to specific mechanical needs...
View Release Bearings Products
Transmissions
Welcome to our Transmissions collection, where we bring you a curated selection of high-quality products designed to enhance your experience. Each item in this collection has been carefully chosen to ensure you receive only the best. What You Will Find in the Transmissions Collection: Innovative Designs: Products that stand out with cutting-edge technology and usability. Quality Assurance: Each item is vetted for performance and durability. Variety of Choices: A diverse range of products to meet your specific needs. Expert Recommendations: Handpicked by professionals to ensure top-notch quality. Why Choose Our Transmissions Products? Our Transmissions products are not just about functionality; they are about elevating your overall experience. Here’s why you should explore this collection: Enhanced Performance: Each product is designed to maximize efficiency and effectiveness. Customer Satisfaction: We prioritize your needs and feedback to ensure every product exceeds exp...
View Transmissions Products