If you're diving into some serious clutch work, the Advanced Clutch Release Bearing RB422 is a solid choice. This isn?t just any release bearing; it?s designed to fit right in, matching or even surpassing those original equipment (OE) standards. I?ve had my hands on this product, and I can tell you, it?s built to last.
Install Instructions:
Now, let?s talk features. The RB422 is precision-engineered to fit like a glove, making it a breeze to install. You?ll appreciate the quality of the steel construction, which feels robust and reliable. No flimsy parts here.
When it comes to specs, this bearing has got you covered. It boasts a round shape and a sealed design, which is a must for keeping dirt and grime out. The inside diameter measures 1.25 inches (or 31.8 mm), while the outside diameter is 2.77 inches (70.4 mm). Weighing in at just 0.7 lbs, it?s light enough to handle but heavy on durability. Plus, it?s self-aligning, so you can count on a smooth operation without any hassle.
As for compatibility, the RB422 fits a couple of classic rides: the Chrysler Conquest from '87 to '89 and the Mitsubishi Starion from '83 to '89. If you?re working on one of these beauties, this release bearing is a no-brainer.
In a nutshell, if you want a reliable release bearing that won't let you down when you're pushing your car to the limit, the RB422 is worth considering. It?s straightforward, effective, and just works.
Other Part Numbers:
ACT #actRB422
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
1987-1989 Chrysler Conquest |
Conquest | 1987-1989 |
|
1983-1989 Mitsubishi Starion |
Starion | 1983-1989 |

If you've added boost, tuned for more power, or simply want better throttle control, then your stock clutch won't cut it. That?s where ACT (Advanced Clutch Technology) comes in delivering high-performance clutch kits and flywheels designed for real drivers who push their builds on the street, strip, or track.
ACT?s lineup includes everything from daily driver friendly HD kits to hardcore twin disc setups for serious horsepower. Whether you?re launching hard in a WRX, drifting in a 370Z, or canyon carving in an M3, ACT gives you the torque capacity and engagement you need without sacrificing drivability.
Why ACT? Because Power Without Control Is Useless.ACT doesn?t just make universal performance parts ? they build complete, vehicle-specific clutch solutions for enthusiast favorites. Whether you daily a Civic Type R, track a Subaru STI, drift a 240SX, or drag a Mustang GT, ACT offers the right clutch to match your build goals.
Top supported platforms include the Nissan 350Z/370Z, Toyota Supra A90, Chevy Camaro SS/ZL1, Mitsubishi Evo, Ford Focus RS/ST, and BMW M3/M4 ? each with clutch options tuned to your driving needs.
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Whether you're upgrading for more power or replacing a tired OEM clutch, ACT gives you the bite, strength, and feel to drive harder with confidence. No compromises, no excuses just parts that work when it matters.