ACT Xtreme Performance Street Sprung Clutch Kit w/ Streetlite Flywheel - 2006-2026 Subaru WRX (SB11-XTSS)

The Ultimate Big-Power Option for Street & Track WRX Builds
The ACT Xtreme Performance Street Sprung Clutch Kit (SB11-XTSS) is engineered specifically for high-powered, turbo Subarus pushing past the limits of a standard heavy-duty clutch. Pairing ACT's notoriously stiff Xtreme pressure plate with a premium organic sprung hub disc, this comprehensive kit safely supports a massive 532 ft-lbs of torque at the crank (a 65% to 72% increase over original equipment). If you are running an aggressive ethanol blend, an upgraded turbocharger, or a heavily tuned FA20/FA24 or EJ255 engine, this kit delivers the brutal clamping force you need without resorting to a noisy, harsh-riding race puck clutch.

The 240mm Footprint Upgraded Conversion
The SB11-XTSS is a complete conversion system that includes an ACT XACT Streetlite Chromoly Flywheel (600890). For 2006–2017 WRX models, this kit safely transitions your vehicle away from the smaller, heat-sensitive factory 230mm setup to a significantly larger 240mm surface area. Because of this architectural change, this kit is an all-inclusive eco-system: it must be installed together and cannot be mixed or matched with OEM factory clutch discs or flywheels.

• Xtreme Clamping Performance: Utilizes an exclusive heat-treated diaphragm design to radically increase clamp load, drop high-RPM deflection, and prolong overall friction life.
• Premium Street Materials: The full-face organic disc features a premium high-copper-content lining for optimized thermal transfer alongside steel-backed linings for burst-proof durability.
• Reduced Marcel Design: Engineered with a shallower marcel wave to facilitate ultra-fast, high-RPM gear shifts during spirited driving or track sessions.
• Smooth, Chatter-Free Control: Enjoy predictable, progressive street engagement with quiet acoustic operation and standard-to-mild gear rattle.

Technical Specifications:

• Part Number: SB11-XTSS
• Torque Capacity: 532 ft-lbs (At Crank)
• Torque Capacity Over OE: +65% to 72%
• Disc Style: Full Face Performance Organic Street Disc (3000505)
• Hub Style: Spring-Centered / Sprung Hub
• Disc Diameter: 240mm (9.4 in.)
• Spline Count / Input Shaft: 24-Spline / 1.000 in.
• Pressure Plate Type: Xtreme (SB020X)
• Flywheel Type: XACT Streetlite Chromoly Flywheel Included (600890)
• Product Total Weight: 28.6 lbs

Fitment:

Engineered strictly for Push-Type manual transmission configurations.

• Subaru WRX: 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026+ (Fits 5-Speed & 6-Speed Manual 2.5L EJ255, 2.0L FA20F, and 2.4L FA24F platforms)
• Subaru Legacy GT / 2.5GT: 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
• Subaru Legacy GT spec.B: 2006, 2007, 2008, 2009
• Subaru Outback XT / 2.5 XT: 2005, 2006, 2007, 2008, 2009
• Subaru Forester XT / Limited / Sports: 2006, 2007, 2008
• Subaru Baja Turbo: 2006
• Subaru Impreza WRX STI [JDM Models Only]: 2006–2007 (2.5L Push-Type configurations)

WRX vs. STI Transmission Selection: The SB11-XTSS is engineered strictly for the Push-Type manual transmissions found in standard WRX models. If you drive a North American USDM Subaru WRX STI (2004–2021) equipped with the large pulling 6-speed transmission, this kit will not fit your vehicle. You will instead need to order the ACT SB10-HDSS Clutch Kit or its matching high-torque SB10-XTSS Clutch Kit.

The Nameless "Installation" Pro-Tip:

Prepare for the Pedal Effort: Let's talk real strategy here. The "XT" in this kit stands for Xtreme, and ACT isn't kidding around. Because the diaphragm spring is heavily revised to generate maximum clamp load, your clutch pedal will feel noticeably stiffer than stock. It is highly recommended for drivers who prefer a rigid, mechanical pedal feel and need the torque headroom for heavy modification. If you are building a daily-driven car that frequently gets stuck in gridlock traffic and you're under 400 whp, consider stepping down to the slightly softer ACT SB11-HDSS package instead.

What's In The Box? This is a true all-in-one overhaul kit. It includes the SB020X Xtreme Pressure Plate, the 3000505 Performance Street Disc, the 600890 Streetlite Flywheel, an AT90 Alignment Tool, a replacement push-style RB846 Release Bearing, and your crucial ACT PB1004 Pilot Bearing. Pressure plate assembly bolts are included, but make sure to grab a fresh set of high-strength ARP Flywheel Bolts (260-2801) to securely mate the assembly to your crank flange!