BLOX Racing Unsprung 7.25" Single Disc Clutch Kit 2004-2021 STI | 450 ft/lb Torque Capacity | Performance Clutch Kit
Overview
The BLOX Racing Unsprung 7.25" Single Disc Clutch Kit is a high-performance upgrade designed specifically for the Subaru WRX STI models from 2004 through 2021. This kit combines a lightweight billet flywheel with a durable single disc clutch system engineered to handle increased power and torque demands, making it ideal for enthusiasts who push their cars on the street, track, or circuit. Whether you’re upgrading for spirited driving or serious track use, this clutch kit offers a reliable and precise engagement that replaces the factory OEM components without requiring any modifications.
Built with premium materials and rigorous testing, the kit features a vented pressure plate crafted from aircraft-quality aluminum alloy for enhanced heat dissipation and clamp load. The clutch disc uses a solid cerametallic friction material known for its high heat tolerance, quick recovery, and long service life. The design philosophy behind this kit focuses on reducing rotational mass with a low moment of inertia flywheel, which improves throttle response and allows for quicker gear changes, all while maintaining smooth modulation and pedal feel.
For Subaru WRX STI owners, this clutch kit delivers tangible benefits in durability and performance. Its torque capacity of up to 450 ft/lb and horsepower capability up to 450 hp make it suitable for heavily modified engines. The push-style release mechanism and precise bearing contact diameter ensure consistent clutch operation under demanding conditions. This combination of features supports aggressive driving styles without sacrificing daily drivability, making it a practical upgrade for enthusiasts who demand more from their drivetrain.
Features & Specifications
This BLOX Racing Unsprung 7.25" Single Disc Clutch Kit is engineered for Subaru WRX STI models from 2004 to 2021 and features a high-torque capacity of up to 450 ft/lb. Constructed from aircraft-quality aluminum and billet chromoly, it delivers lightweight durability and precise clutch engagement for Subaru enthusiasts seeking reliable performance upgrades.
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Brand: BLOX
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Product: Unsprung 7.25" Single Disc Clutch Kit
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Part Number: BXFL-10510
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Fitment: 2004-2021 Subaru WRX STI
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Material: Aircraft Quality Aluminum Alloy (Pressure Plate), Billet Chromoly (Flywheel)
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Finish: Natural Aluminum and Chromoly Finish
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Construction: Vented Pressure Plate, One-Piece Billet Flywheel
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Origin: Not Specified
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Clutch Type: Push Style Release Mechanism
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Clutch Disc Diameter: 7.25" (185mm)
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Clutch Disc Thickness: 0.250" (6.35mm)
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Clutch Disc Quantity: Single
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Clutch Disc Material: Cerametallic (Solid Center Hub)
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Torque Capacity: Up to 450 ft/lb
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Horsepower Capacity: Up to 450 hp
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Release Travel Required: 5mm
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Bearing Contact Diameter: 44-52mm
Key Benefits
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Performance: Handles up to 450 ft/lb torque and 450 hp, supporting heavily modified WRX STI builds.
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Durability: Premium cerametallic friction material offers high heat tolerance and long service life under demanding conditions.
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Fitment: Direct OEM replacement with no modifications required, ensuring a straightforward upgrade.
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Weight Savings: Lightweight billet flywheel reduces rotational mass for quicker throttle response and faster gear changes.
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Engagement: Vented pressure plate and push-style release mechanism provide smooth, precise clutch modulation.
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Quality Assurance: Load-tested pressure plates guarantee consistent clamp load and reliable performance.
What's Included
- 1× BLOX Racing Unsprung 7.25" Single Disc Clutch Kit
- 1× Lightweight Billet Flywheel
- 1× Throw-Out Bearing
- 1× Alignment Tool
- Installation instructions
Installation & Compatibility
This clutch kit is designed as a direct OEM replacement for Subaru WRX STI models from 2004 to 2021, requiring no modifications to the vehicle’s drivetrain. Installation is moderately complex and typically recommended for experienced DIYers or professional mechanics familiar with Subaru transmissions. Special tools such as a clutch alignment tool (included) and standard transmission service tools are necessary. Due to the performance-oriented nature of this clutch, tuning or adjustments to driving style may be required to optimize engagement and longevity, especially on heavily modified engines.
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Professional Installation: Recommended for best results
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Modifications Required: None
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Verify Compatibility: Confirm fitment for your specific STI model year and trim
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