Description
Rather than treating clutch selection as a universal fit, the EXEDY Stage 1 Organic Clutch Kit – 2004–2014 Subaru Impreza WRX STI H4 is organized specifically for 2004–2014 Subaru Impreza WRX STI H4, with configurations chosen around enthusiast street, autocross, HPDE, and modified performance builds.
About EXEDY
With roots in Japan dating to 1923, EXEDY has spent generations engineering clutches and powertrain components for both vehicle manufacturers and the aftermarket. That OEM foundation carries into its performance range, where organic, cerametallic, chromoly, and multi-plate technologies are developed for increasingly demanding street and competition applications.
Why This Part Fits the Build
EXEDY's performance single- and multi-plate systems are intended to raise torque capacity and heat tolerance while matching the engagement characteristics to the car's intended use. Stage 1 uses an organic friction strategy for the most street-friendly behavior; Stage 2 moves to cerametallic friction for harder use; Hyper systems add dedicated flywheel and multi-plate architecture for substantially higher-output builds.
Choose the least aggressive configuration that comfortably covers the engine's torque and heat load. That approach normally gives the best balance of drivability, service life, transmission friendliness, and track durability.
Configuration
- EXEDY Part Number: 15803HD
- Configuration: Stage 1 Organic Clutch Kit
- Construction / Character: Application-specific EXEDY configuration
- Torque Rating: Application-specific / verify EXEDY rating
- Best Suited For: Use where this exact EXEDY configuration and fitment are required
Setup Guidance
For 2004–2014 Subaru Impreza WRX STI H4, this configuration makes the most sense when its intended duty matches the vehicle's actual power and use. Avoid overspecifying clutch aggressiveness: the best setup is the one that maintains the needed torque reserve while preserving usable modulation and protecting the rest of the driveline.
Key Technical Specifications
- Clamp Load: Stage 1/2 covers are designed around roughly 40% higher clamping load than the genuine part
- Pedal Effort: Typical Stage 1/2 increase is approximately 20–35%, application dependent
- Flywheel Compatibility: Stage 1/2 generally use the OEM flywheel unless noted; Hyper systems include/require their dedicated flywheel
- Certification: EXEDY Stage 1, Stage 2 and Lightweight Flywheel products are SFI 1.1 certified
- Vehicle Application: 2004–2014 Subaru Impreza WRX STI H4
- EXEDY SKU: 15803HD
Fitment note: Before ordering, confirm the exact year, trim, engine, transmission, and flywheel/clutch-system combination. EXEDY may use different components within the same model range, particularly where transmissions or factory flywheel designs changed.