Action Clutch ACR-1818 Stage 3 Performance Clutch Kit with Ceramic Sprung Disc

The Action Clutch ACR-1818 Stage 3 (1MS) Clutch Kit is engineered for enthusiasts demanding superior holding capacity and performance from their turbocharged Subaru WRX. This heavy-duty clutch system features a single diaphragm pressure plate with reinforced drive straps and a sprung MIBA ceramic disc available in 4-puck or 6-puck configurations, delivering 170% increased holding capacity over the factory clutch while maintaining street drivability.

Key Features:

• Heavy-duty single diaphragm pressure plate with reinforced drive straps for extreme durability
• Sprung MIBA ceramic disc (4 or 6 puck) for aggressive engagement and rapid heat dissipation
• Rated for 435 HP and 419 lb-ft torque capacity at the crank
• Patented fully enclosed spring retainers prevent spring displacement and protect against transmission damage
• Light to medium pedal feel with aggressive engagement characteristics
• Compatible with factory OEM flywheel for 2015-2018 WRX models
• SFI Spec 1.1 certified for racing applications
• 100% hand-assembled in Los Angeles, USA

What's Included:

• Performance Stage 3 ceramic 6-puck sprung disc (9-1/16" x 1" x 24 spline)
• Single diaphragm HD pressure plate
• Premium throwout bearing
• Premium pilot bearing
• Clutch alignment tool

Performance Application: Ideal for heavy-duty street use and occasional drag, road, or drift racing. Perfect for modified WRX builds with turbo upgrades, intake/exhaust modifications, and custom tuning. The sprung hub design provides moderate dampening for improved street manners compared to rigid disc designs.

Important Installation Notes: A 500-mile break-in period is required (keep RPMs under 4500, no more than half-throttle, no boost). Some clutch chatter is normal with ceramic disc materials and will minimize after proper break-in. Mid-2018 and newer WRX models with VIN starting with J*806877 require an upgraded flywheel (see Subaru TSB 03-79-18R). Professional installation recommended.

Each kit is quality-checked and signed off by Action Clutch engineers with over 60 years of collective experience. Backed by a 12-month or 15,000-mile limited warranty covering performance, fitment, and function.