Action Clutch ACR-1802-2OS Stage 1 HD Clutch Kit for 04-21 Subaru WRX STI 2.5L

Vehicle Fitment

• 2004-2021 Subaru WRX STI (2.5 L Turbo EJ257, AWD) - manual transmission.

Features

• Stage 1 HD (2OS) clutch kit designed for heavy-duty street use and mild track duty
• Reinforced steel-backed copper-Kevlar® organic friction disc for smoother engagement and increased durability
• Heavy-duty single-diaphragm pressure plate delivering higher clamp load than OEM
• Patented fully-enclosed spring-retainer design prevents spring pop-out and improves transmission safety
• Direct-fit for the specified WRX STI application - no modifications required for confirmed years
• Smoother engagement than full race kits while providing significant clamp load improvement
• Recommended for vehicles with stock to moderate power upgrades - ideal for heavy-duty street builds
• Includes alignment tool, release bearing and pilot bearing/bushing (where applicable)

Specifications

• Kit type: Stage 1 HD (2OS) heavy-duty sprung organic clutch kit
• Friction material: Steel-backed copper-Kevlar® organic
• Pressure plate: Heavy-duty single-diaphragm design
• Engine compatibility: 2.5 L Turbo (EJ257) in Subaru WRX STI 2004-2021
• Drivetrain: All-Wheel Drive (AWD)
• Fitment note: Confirmed through 2021 for the listed application; compatibility for later years or other trims/engine variants is unverified at time of listing.

Included Components

• 1x Sprung organic clutch disc (kit-matched)
• 1x Heavy-duty single-diaphragm pressure plate
• 1x Release bearing (where applicable)
• 1x Pilot bearing or bushing (where applicable)
• 1x Alignment tool

Product Description

The Action Clutch ACR-1802-2OS Stage 1 HD Clutch Kit is engineered specifically for the 2004-2021 Subaru WRX STI equipped with the 2.5 L Turbo EJ257 engine and AWD drivetrain. It offers a strong upgrade in clamp load and durability while retaining smoother engagement relative to full-race kits - making it ideal for heavy-duty street builds and mild-track use.

Featuring a reinforced steel-backed copper-Kevlar® disc and a heavy-duty pressure plate, the kit delivers significantly improved holding capacity compared to the factory clutch. The fully-enclosed spring-retainer system enhances reliability and extends service life under abusive conditions. Installation is direct-fit for the confirmed vehicle application - no modifications to the transmission or drivetrain are required for the listed years.

Fitment is confirmed through the model year 2021 for this Subaru WRX STI 2.5 L Turbo AWD. Compatibility for years beyond 2021, other trims or engine variants is unverified at time of listing. Please verify your exact vehicle configuration before purchase.