SKU: XKSU18521-3E | UPC: 9337467307382
XClutch 15-21 Subaru WRX STi Base 2.5L 7.25in Triple Solid Ceramic Clutch Kit
This Stage 5 XClutch kit features a 7.25-inch triple solid ceramic disc design for 2015-2021 Subaru WRX STI Base 2.5L models with 6-speed manual transmissions. It delivers strong torque holding up to 1200 ft-lbs for high horsepower setups while keeping a lightweight build for sharp throttle response. Perfect for track or street performance where power demands exceed stock limits.
Key Features
- Triple Solid Ceramic Discs: 7.25-inch diameter provides high torque capacity and heat resistance for demanding drives
- Includes Flywheel: Stepped flywheel matches OEM specs for direct bolt-on fit and balanced operation
- Release Pilot Bearings: High-quality bearings ensure smooth engagement and long service life
- Bolts and Alignment Tool: Complete hardware kit with pressure plate and flywheel bolts plus tool for precise installation
- Lightweight Design: Reduces rotational mass for quicker revs and better drivability in high power applications
Product Notes
- Designed for vehicles with sequential or high power transmissions check kit contents for your setup
- Break-in period recommended follow manufacturer guidelines for ceramic discs
- Special order item confirm stock before purchase
Installation Notes
- Professional installation recommended.
- Requires transmission removal access to bellhousing
- All necessary bolts and alignment tool provided compatible with OEM flywheel pattern
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2021 | Subaru | WRX STI | Base 2.5L |
Why Choose XClutch?
- Race-proven components trusted in motorsport applications worldwide
- Engineered for precision fit and durability in performance environments
- Direct replacement design maintains stock pedal feel with added capacity
Frequently Asked Questions
-
Q: Does this fit 2015-2021 Subaru WRX STI with 2.5L engine?
A: Yes fits all 6-speed manual WRX STI Base 2.5L models from 2015-2021 VA chassis direct bolt-on -
Q: What material are the discs made from?
A: Solid ceramic discs offer superior heat dissipation and grip for high torque without glazing -
Q: What is the warranty on this clutch kit?
A: 12-month warranty against defects when installed by certified technician proper break-in required
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Securely boxed 18 x 14 x 10 inches
- Weight: 42 lbs
Clutch Components
A performance clutch system is one of the most impactful drivetrain upgrades available for any manual transmission vehicle. From street-friendly organic disc kits to heavy-duty ceramic setups built for drag racing and track use, matching the right clutch components to your power level and driving style keeps engagement consistent and power transfer reliable.Popular UpgradesStage 1 and Stage 2 clutch kits with upgraded pressure plates and organic or hybrid friction discs are the most popular choice for street builds making 300 to 500 horsepower. Stage 3 and Stage 4 ceramic or Kevlar disc setups handle the demands of forced induction or high-compression builds. Lightweight aluminum flywheels paired with upgraded clutch kits improve rev response and make gear changes faster on both street and track applications.What clutch stage do I need for my build?Stage 1 clutches are rated for lightly modified street engines up to about 350 horsepower. Stage 2 kits cover 350 to 500 horsepower with...
View Clutch Components Products
Clutch Kits - Multi
Multi-disc clutch kits bundle the friction disc, pressure plate, and release bearing together in a single purchase, ensuring all worn components are replaced at the same time for consistent performance after install. These kits are available in organic, ceramic, and hybrid friction materials to match a wide range of power levels and driving styles.Popular UpgradesStage 2 and Stage 3 multi-disc clutch kits for LS, LT, small-block Ford, and Mopar applications are the most frequently purchased options for modified street vehicles. Kits that include a lightweight aluminum flywheel alongside the disc, pressure plate, and bearing are ideal for builds where improved rev response is a priority. OEM-spec replacement kits for high-mileage vehicles restore factory engagement feel without requiring individual component sourcing.What is included in a multi-disc clutch kit?A standard multi-disc clutch kit includes one or more friction discs, a matched pressure plate, and a release bearing. Some p...
View Clutch Kits - Multi 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


