{"product_id":"clutch-masters-850-series-race-twin-disc-clutch-kits-2006-2009-legacy-2004-2021-sti-1","title":"Clutch Masters 850 Series Race Twin Disc Clutch Kit 06-09 Legacy \/ 04-21 STI","description":"\u003ch3\u003eClutch Masters 850 Series Race Twin Disc Clutch Kit 06-09 Legacy \/ 04-21 STI | High Clamping Force | Twin Disc Clutch Kit\u003c\/h3\u003e\n\n\u003ch4\u003eOverview\u003c\/h4\u003e\n\u003cp\u003eThe Clutch Masters 850 Series Race Twin Disc Clutch Kit is engineered for Subaru enthusiasts seeking ultimate clutch performance for their 2006-2009 Legacy or 2004-2021 WRX STI. This 8.5” twin disc system is designed to handle high horsepower and torque outputs while maintaining manageable pedal pressure, making it suitable for both race and high-performance street applications. Available in \"Street\" and \"Race\" stages, it offers flexibility depending on your driving style and power goals.\u003c\/p\u003e\n\u003cp\u003eBuilt with precision and durability in mind, the kit features a billet aluminum cover that is Type 3 hard anodized for strength and longevity. This cover exhibits minimal flex compared to cast or stamped units, ensuring consistent clutch engagement and improved driver confidence. The unique Quick Release (QR) pressure plate system reduces clutch chatter and noise by up to 50%, delivering smooth and reliable operation even under demanding conditions.\u003c\/p\u003e\n\u003cp\u003eFor Subaru owners pushing the limits of their drivetrain, this twin disc clutch kit provides increased clamping force and a larger friction surface area, translating to better power transfer and reduced slippage. The option to upgrade to the DLX series adds inherent damping to both discs, protecting the drivetrain from shock loads and enhancing durability for daily-driven high horsepower builds or race cars. This clutch kit is a direct fit for the specified Legacy and WRX STI models, making it a practical upgrade for serious Subaru performance enthusiasts.\u003c\/p\u003e\n\n\u003ch4\u003eFeatures \u0026amp; Specifications\u003c\/h4\u003e\n\u003cp\u003eThis Clutch Masters 850 Series Race Twin Disc Clutch Kit is engineered for 2006-2009 Legacy and 2004-2021 WRX STI platforms and features an 8.5” twin disc design with a billet aluminum cover. Constructed from high-strength billet aluminum and premium friction materials, it delivers superior clamping force and consistent engagement for Subaru drivers seeking race-level clutch performance.\u003c\/p\u003e\n\u003cul style=\"list-style:none;padding:0;margin:0;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Clutch Masters\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e 850 Series Race Twin Disc Clutch Kit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 15017-TD8R-XW\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e 2018-2021 WRX STI, 2006-2009 Legacy\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Billet aluminum cover, ceramic and fiber friction discs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Type 3 hard anodized (cover and aluminum flywheel)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e CNC machined billet cover, sprung and rigid discs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Not specified\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClutch Diameter:\u003c\/strong\u003e 8.5 inches (216mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDisc Configuration:\u003c\/strong\u003e Twin disc with sprung ceramic and rigid discs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure Plate:\u003c\/strong\u003e Quick Release (QR) system with spring-loaded bolts\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlywheel Options:\u003c\/strong\u003e Billet 6061-T6 aluminum (SFI 1.2 spec) or 1045 steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStages Available:\u003c\/strong\u003e Street (TD8S) and Race (TD8R)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePedal Pressure Increase:\u003c\/strong\u003e Approx. 50% higher than single disc setups\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUpgrade Option:\u003c\/strong\u003e DLX series with dampened twin discs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eKey Benefits\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePerformance:\u003c\/strong\u003e Handles high horsepower and torque with increased clamping force for reliable power transfer.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurability:\u003c\/strong\u003e Billet aluminum cover reduces flex, improving clutch consistency and longevity under race conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEngagement:\u003c\/strong\u003e Quick Release pressure plate system smooths clutch operation and reduces noise and chatter.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Direct fit for 06-09 Legacy and 04-21 WRX STI, ensuring seamless installation without modifications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustability:\u003c\/strong\u003e Available in Street and Race stages to suit different driving needs and power levels.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e Optional DLX upgrade adds damping to reduce drivetrain shock and improve daily drivability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1× Clutch Masters 850 Series Race Twin Disc Clutch Kit\u003c\/li\u003e\n  \u003cli\u003e1× Quick Release pressure plate assembly\u003c\/li\u003e\n  \u003cli\u003e1× Sprung ceramic disc\u003c\/li\u003e\n  \u003cli\u003e1× Rigid ceramic or fiber disc (depending on stage)\u003c\/li\u003e\n  \u003cli\u003e1× Aluminum or steel flywheel (application-specific)\u003c\/li\u003e\n  \u003cli\u003eInstallation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eInstallation \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp\u003eInstallation of the Clutch Masters 850 Series Twin Disc Clutch Kit is moderately complex and generally recommended for experienced DIYers or professional mechanics due to the precision required for clutch alignment and flywheel installation. No special tools beyond standard clutch installation equipment are typically necessary. This kit is a direct bolt-on for the specified 2006-2009 Legacy and 2004-2021 WRX STI models, but verifying exact year and trim compatibility is essential before purchase. Tuning is recommended after installation to optimize drivetrain performance and ensure smooth engagement, especially for race-stage setups.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProfessional Installation:\u003c\/strong\u003e Recommended\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModifications Required:\u003c\/strong\u003e None\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVerify Compatibility:\u003c\/strong\u003e Confirm fitment for your specific year and trim level\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eShop with confidence at Subimods—your Subaru parts specialists.\u003c\/p\u003e","brand":"Clutch Masters","offers":[{"title":"Default Title","offer_id":47131534065839,"sku":"15017-TD8R-XW","price":1753.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/3598\/4815\/files\/M198789430.jpg?v=1782935201","url":"https:\/\/subimods.com\/products\/clutch-masters-850-series-race-twin-disc-clutch-kits-2006-2009-legacy-2004-2021-sti-1","provider":"Subimods.com","version":"1.0","type":"link"}