{"product_id":"act-extreme-performance-street-sprung-clutch-kit-monoloc-2004-2021-subaru-wrx-sti-sb10-xtss","title":"ACT Extreme Performance Street Sprung Clutch Kit with Monoloc, 2004-2021 Subaru WRX STI \u0026 Legacy GT spec.B | SB10-XTSS","description":"\u003cp\u003eThe ACT SB10-XTSS Extreme Performance Street Sprung Clutch Kit pairs an Xtreme pressure plate with a Performance street organic disc for demanding street and track driving. The Xtreme pressure plate's diaphragm design increases clamp load and reduces deflection to extend clutch life, and every diaphragm undergoes ACT's four-stage heat-treating process. Precision cover stampings add rigidity and consistency to the pressure plate. The included Performance street disc uses premium organic friction material with higher copper content for improved heat transfer and steel-backed lining for greater burst strength, with a reduced marcel for faster shift action. The kit also includes ACT's Monoloc, a one-piece, direct replacement for the standard two-piece wedge collar and wire ring found in pull-type clutches; its hardened chrome-moly construction provides uniform loading on the bearing and pressure plate for consistent alignment regardless of driver input or vehicle modifications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTorque Capacity: 598 ft-lb (68% over OE)\u003c\/li\u003e\n\u003cli\u003eProduct Weight: 18.2 lbs\u003c\/li\u003e\n\u003cli\u003ePressure Plate: Xtreme, four-stage heat-treated diaphragm\u003c\/li\u003e\n\u003cli\u003eDisc Material: Organic, reduced marcel for faster shift action\u003c\/li\u003e\n\u003cli\u003eFriction Surface: 9.4 in \/ 240mm\u003c\/li\u003e\n\u003cli\u003eRetaining Ring: ACT Monoloc, one-piece hardened chrome-moly (included)\u003c\/li\u003e\n\u003cli\u003eRecommended Use: Street and race use\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eVehicle Applications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e2004 Subaru Impreza WRX STI\u003c\/li\u003e\n\u003cli\u003e2005 Subaru Impreza WRX STI\u003c\/li\u003e\n\u003cli\u003e2006 Subaru Impreza WRX STI\u003c\/li\u003e\n\u003cli\u003e2007 Subaru Impreza WRX STI\u003c\/li\u003e\n\u003cli\u003e2007 Subaru Legacy GT spec.B\u003c\/li\u003e\n\u003cli\u003e2008 Subaru Impreza WRX STI\u003c\/li\u003e\n\u003cli\u003e2008 Subaru Legacy GT spec.B\u003c\/li\u003e\n\u003cli\u003e2009 Subaru Impreza WRX STI\u003c\/li\u003e\n\u003cli\u003e2009 Subaru Legacy GT spec.B\u003c\/li\u003e\n\u003cli\u003e2010 Subaru Impreza WRX STI\u003c\/li\u003e\n\u003cli\u003e2010 Subaru Impreza WRX STI Special Edition\u003c\/li\u003e\n\u003cli\u003e2011 Subaru Impreza WRX STI\u003c\/li\u003e\n\u003cli\u003e2012 Subaru Impreza WRX STI\u003c\/li\u003e\n\u003cli\u003e2013 Subaru Impreza WRX STI\u003c\/li\u003e\n\u003cli\u003e2013 Subaru WRX STI\u003c\/li\u003e\n\u003cli\u003e2013 Subaru WRX STI Base\u003c\/li\u003e\n\u003cli\u003e2014 Subaru Impreza WRX STI\u003c\/li\u003e\n\u003cli\u003e2014 Subaru WRX STI\u003c\/li\u003e\n\u003cli\u003e2014 Subaru WRX STI Base\u003c\/li\u003e\n\u003cli\u003e2014 Subaru WRX STI Tsurugi Edition\u003c\/li\u003e\n\u003cli\u003e2015 Subaru WRX STI\u003c\/li\u003e\n\u003cli\u003e2015 Subaru WRX STI Base\u003c\/li\u003e\n\u003cli\u003e2015 Subaru WRX STI Launch Edition\u003c\/li\u003e\n\u003cli\u003e2015 Subaru WRX STI Limited\u003c\/li\u003e\n\u003cli\u003e2016 Subaru WRX STI\u003c\/li\u003e\n\u003cli\u003e2016 Subaru WRX STI Base\u003c\/li\u003e\n\u003cli\u003e2016 Subaru WRX STI Limited\u003c\/li\u003e\n\u003cli\u003e2016 Subaru WRX STI Series.HyperBlue\u003c\/li\u003e\n\u003cli\u003e2017 Subaru WRX STI Base\u003c\/li\u003e\n\u003cli\u003e2017 Subaru WRX STI Limited\u003c\/li\u003e\n\u003cli\u003e2017 Subaru WRX STI Sport\u003c\/li\u003e\n\u003cli\u003e2018 Subaru WRX STI Base\u003c\/li\u003e\n\u003cli\u003e2018 Subaru WRX STI Limited\u003c\/li\u003e\n\u003cli\u003e2018 Subaru WRX STI Sport\u003c\/li\u003e\n\u003cli\u003e2018 Subaru WRX STI STI\u003c\/li\u003e\n\u003cli\u003e2018 Subaru WRX STI Type RA\u003c\/li\u003e\n\u003cli\u003e2019 Subaru WRX STI Base\u003c\/li\u003e\n\u003cli\u003e2019 Subaru WRX STI Limited\u003c\/li\u003e\n\u003cli\u003e2019 Subaru WRX STI Sport\u003c\/li\u003e\n\u003cli\u003e2020 Subaru WRX STI Base\u003c\/li\u003e\n\u003cli\u003e2020 Subaru WRX STI Limited\u003c\/li\u003e\n\u003cli\u003e2020 Subaru WRX STI Sport\u003c\/li\u003e\n\u003cli\u003e2020 Subaru WRX STI STI\u003c\/li\u003e\n\u003cli\u003e2021 Subaru WRX STI Base\u003c\/li\u003e\n\u003cli\u003e2021 Subaru WRX STI Limited\u003c\/li\u003e\n\u003cli\u003e2021 Subaru WRX STI Sport\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWarning: This product can expose you to chemicals including carbon black, glass wool fibers, or silica (in clutch discs), chromium and nickel, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov\u003c\/p\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch5\u003eWhat does the ACT Monoloc included in this kit do?\u003c\/h5\u003e\u003cp\u003eMonoloc is a one-piece, direct replacement for the standard two-piece wedge collar and wire ring used in pull-type clutches. Its hardened chrome-moly construction provides uniform loading on the bearing and pressure plate for consistent alignment, regardless of driver input or vehicle modifications.\u003c\/p\u003e\u003ch5\u003eWhat is the torque capacity of the SB10-XTSS kit?\u003c\/h5\u003e\u003cp\u003e598 ft-lb, a 68% increase over the factory clutch.\u003c\/p\u003e\u003ch5\u003eIs this kit suited for daily street driving or track use?\u003c\/h5\u003e\u003cp\u003eBoth. ACT rates it for street and race use, with moderate-to-heavy pedal effort, smooth positive engagement, and OE to mild gear rattle.\u003c\/p\u003e\u003ch5\u003eDoes this kit fit the 2018 WRX STI Type RA?\u003c\/h5\u003e\u003cp\u003eYes, the SB10-XTSS covers the 2018 WRX STI Type RA along with WRX STI Base, Limited, and Sport trims from 2013-2021, plus 2004-2014 Impreza WRX STI and 2007-2009 Legacy GT spec.B. See the full Vehicle Applications list above to confirm the exact year and trim.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What does the ACT Monoloc included in this kit do?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Monoloc is a one-piece, direct replacement for the standard two-piece wedge collar and wire ring used in pull-type clutches. Its hardened chrome-moly construction provides uniform loading on the bearing and pressure plate for consistent alignment, regardless of driver input or vehicle modifications.\"}},{\"@type\":\"Question\",\"name\":\"What is the torque capacity of the SB10-XTSS kit?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"598 ft-lb, a 68% increase over the factory clutch.\"}},{\"@type\":\"Question\",\"name\":\"Is this kit suited for daily street driving or track use?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Both. ACT rates it for street and race use, with moderate-to-heavy pedal effort, smooth positive engagement, and OE to mild gear rattle.\"}},{\"@type\":\"Question\",\"name\":\"Does this kit fit the 2018 WRX STI Type RA?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, the SB10-XTSS covers the 2018 WRX STI Type RA along with WRX STI Base, Limited, and Sport trims from 2013-2021, plus 2004-2014 Impreza WRX STI and 2007-2009 Legacy GT spec.B.\"}}]}\u003c\/script\u003e","brand":"Advanced Clutch","offers":[{"title":"Default Title","offer_id":42652786589744,"sku":"BHXS_SB10-XTSS","price":875.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0586\/9548\/3440\/files\/ACTSB10-XTSS.jpg?v=1765876063","url":"https:\/\/berryperformancesales.com\/products\/act-extreme-performance-street-sprung-clutch-kit-monoloc-2004-2021-subaru-wrx-sti-sb10-xtss","provider":"Berry Performance Sales","version":"1.0","type":"link"}