Spec Stage 1 Clutch Kit - Nissan Skyline RB20DET (R32/R33) Manual Transmission Only
The Spec Stage 1 clutch kit for the Nissan RB20DET engine provides increased torque capacity and improved drivability for mild to moderate performance builds. Featuring a high-clamp load pressure plate and a reinforced full-face organic disc with steel-backed linings, this kit delivers smooth engagement, quiet operation, and reliable holding power up to 400+ ft-lbs while maintaining near-stock pedal feel perfect for daily-driven Skylines with bolt-ons, cams, or light turbo upgrades.
Key Features
- High-Clamp Pressure Plate: Increased clamp load with reinforced drive straps and marcel spring for durability.
- Steel-Backed Organic Disc: Full-face organic material on both sides with sprung hub for smooth engagement and reduced shock.
- Torque Capacity: Rated for 400+ ft-lbs at the wheels (depending on tune and traction).
- Alignment Tool & Pilot Bearing: Included for precise installation.
- Release Bearing: High-quality throw-out bearing included.
- Hand-Assembled & Balanced: Every kit tested for balance and clamp load.
- Flywheel Not Included: Uses stock flywheel or lightweight upgrade.
- Made in USA: Manufactured by Spec Clutches in Bessemer, Alabama.
Product Notes
- Part number: CSN231 (Stage 1 for RB20DET).
- Flywheel NOT included – requires stock or lightweight flywheel (Spec billet steel recommended).
- Compatible with factory hydraulic release system.
- Pedal effort approximately 15-20% stiffer than stock – very street-friendly.
- Recommended for street, autocross, and light track use.
- Kit weight approximately 22-25 lbs.
- Limited 1-year / 12,000-mile warranty (no racing coverage).
Installation Notes
- Direct replacement transmission removal required.
- Professional installation recommended.
- Break-in procedure: 500 miles gentle driving before aggressive use.
- Typical install time 6-8 hours.
This Part Fits
| Year | Make | Model | Engine | Transmission |
|---|---|---|---|---|
| 1989-1993 | Nissan | Skyline R32 GTS-t | RB20DET | 5-Speed Manual |
| 1993-1998 | Nissan | Skyline R33 GTS-t | RB20DET | 5-Speed Manual |
| Universal | Nissan | RB20DET Swaps | RB20DET | 5-Speed Manual |
Why Choose Spec Stage 1?
- 30+ years specializing in high-performance clutch systems for Nissan RB engines.
- Stage 1 proven on 300-450hp RB20DET street cars worldwide.
- Steel-backed organic disc provides smooth engagement and long life.
Frequently Asked Questions
-
Q: Does this include a flywheel?
A: No, flywheel is not included. Uses stock flywheel or lightweight upgrade. -
Q: How much pedal effort increase?
A: Approximately 15-20% stiffer – very comfortable for daily driving. -
Q: Will this work with RB25DET?
A: No, RB25DET requires different kit (CSN232).
Shipping & Handling
- Method: Standard ground shipping.
- Package Weight: Approximately 28–32 lbs.
- Box Dimensions (approx): 16" × 16" × 8".
Clutch Components
Clutch components for manual transmission builds are stocked at Black Ops Auto Works, spanning single and multi disc clutch kits, master cylinders, clutch lines, clutch forks, and rebuild kits. Shop applications for Subaru WRX and STI, Honda and Acura D-Series, Nissan Skyline GT-R and 350Z, BMW E46 M3, Ford Mustang GT and GT500, GM LS platforms, and Dodge Challenger HEMI. Kits range from street-friendly organic disc setups to twin and triple plate racing clutches for high horsepower and forced induction builds. Black Ops Auto Works carries 1,537 clutch component SKUs. What This Category Covers This collection includes clutch covers, clutch discs, clutch forks, clutch lines, clutch master cylinders, clutch rebuild kits, and both single and multi disc clutch kits for manual transmission vehicles across import and domestic platforms. Choosing a Clutch Stage for Your Build Stage 1 clutches suit lightly modified street engines up to about 350 horsepower, Stage 2 kits cover 350 to 500...
View Clutch Components Products
Clutch Kits - Single
Single-disc clutch kits for import sport-compacts, European performance cars, and domestic muscle cars are stocked at Black Ops Auto Works. Shop complete disc, pressure plate, and release bearing kits from Competition Clutch, ACT, OS Giken, Clutch Masters, BLOX Racing, Spec, and XClutch for platforms like the Subaru WRX, Honda Civic Type R, BMW 3 Series, Mini Cooper S, Nissan 350Z, Camaro SS, and Toyota Supra. Every kit here is filterable by year, make, model, and power level, from Stage 1 street-friendly organic discs to Stage 3 ceramic kits built for forced induction. Black Ops Auto Works carries 935 Single Clutch Kit SKUs across organic, sprung-hub, and ceramic disc categories. What This Category Covers A single-disc clutch kit includes the clutch disc, pressure plate, and release bearing needed to replace a worn factory clutch or upgrade to a higher-holding-capacity setup for modified engines. These kits cover naturally aspirated daily drivers, turbocharged and supercharged ...
View Clutch Kits - Single Products
Drivetrain
Drivetrain parts for high-horsepower Mopar, truck, Jeep, and import platforms are stocked at Black Ops Auto Works. Shop differentials, axles, driveshafts, clutch kits, flywheels, flexplates, shifters, transmission components, ring and pinion gears, differential braces, and driveline hardware for Hellcat, Trackhawk, TRX, HEMI, LS, LT, Coyote, and turbocharged import platforms. Every drivetrain part is filterable by vehicle platform, drivetrain layout, transmission type, and power level so the correct part ships the first time. Black Ops Auto Works carries 4,765 drivetrain SKUs across differentials, axles, clutches, and transmission hardware. What This Category Covers The drivetrain transfers power from the engine to the wheels and includes the transmission, clutch, driveshafts, axles, differentials, ring and pinion gears, wheel hubs, wheel bearings, U-joints, shifters, mounts, and bushings. Upgrading these components improves power delivery, durability, and reliability under incr...
View Drivetrain Products
SPEC
SPEC performance clutch kits, twin-disc kits, clutch discs, and steel flywheels are stocked at Black Ops Auto Works for Mustang, Camaro, Corvette, WRX STI, EVO, Civic, Miata, Nissan Skyline, Supra, Golf GTI, Audi, BMW, and Genesis Coupe performance builds. Shop Stage 1 through Stage 5+ single-disc clutch kits, Super Twin multi-disc kits, pressure plates, replacement clutch discs, steel flywheels, aluminum flywheels, hydraulic release parts, and clutch hardware. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 128 SPEC SKUs across street performance, drag racing, road racing, drift, and boosted engine builds. What This SPEC Collection Covers SPEC builds application-specific clutch systems for drivers who need a predictable engagement point and holding capacity matched to torque, tire, gearing, and driving style. This collection includes streetable single-disc upgrades, high-capaci...
View SPEC Products


