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ACT Xtreme Duty Performance Street Disc Clutch Kit (Part Number: )
ACT Xtreme Duty Performance Street Disc Clutch Kit (Part Number: )
ACT Xtreme Duty Performance Street Disc Clutch Kit (Part Number: )
ACT Xtreme Duty Performance Street Disc Clutch Kit (Part Number: )
ACT Xtreme Duty Performance Street Disc Clutch Kit (Part Number: )
ACT Xtreme Duty Performance Street Disc Clutch Kit (Part Number: )
ACT Xtreme Duty Performance Street Disc Clutch Kit (Part Number: )
ACT Xtreme Duty Performance Street Disc Clutch Kit (Part Number: )
Community Media
ACT Xtreme Duty Performance Street Disc Clutch Kit (Part Number: )
ACT Xtreme Duty Performance Street Disc Clutch Kit
Subaru STI 2004+ / Legacy GT spec.B 2007-2009
Read 14 Reviews | 11 Q&As
Part # SB10-XTSS
msrp: $854.00

In stock! Ships same day

Features & Product Details

RallySport Direct is proud to carry the ACT Xtreme Duty Performance Street Disc Clutch Kit. This clutch kit is perfect for those of you with moderate bolt-ons, and need a clutch that is strong enough to handle the power. This clutch kit features the ACT Xtreme Pressure Plate which has been designed with an exclusive diaphragm design to increase clamp load, reduce deflection, and to maximize clutch life. The diaphragm endures a four-stage heat-treating process to deliver optimal performance in demanding conditions. 

Here are the key features:

  • 60% Torque capacity over OEM
  • Torque capacity of 590lbs
  • Disc diameter 9.4 inches (240mm)
  • 24 Spline count
  • Clutch disc features organic materials with higher copper content that allows for better heat transfer
  • Moderate to heavy pedal effort, smooth positive engagement, OE to mild gear rattle, better confidence during hard shifts
  • Longer friction life, exclusive diaphragm design, dramatic improvement in release mechanism life
  • Recommended for street and race use
  • Clutch kit includes:

  • Xtreme Duty Pressure Plate
  • Street disc
  • Release bearing
  • Pilot bearing
  • Clutch alignment tool
  • Specifications

    Brand: ACT
    Alignment Tool Included: Yes
    Clamp Load Increase: 60%
    Crank Torque Capacity: 565 ft/lbs
    Disc Material: Organic
    Disc Style: Sprung Hub
    Disc Type: Disc
    Flywheel Included: No
    Pilot Bearing Included: Yes
    Pressure Plate Style: Pull
    SFI Approved: Yes
    Throwout Bearing Included: Yes
    Wheel Torque Capacity: Not Provided
    Mfgr. Warranty: 1 Year
    Condition: New Product
    Return Policy:

    RallySport Guarantee - 30 Days

    Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

    RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

    The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
    RallySport Guarantee
    WARNING: Cancer and Reproductive Harm -



    14 Reviews
    4.5 out of 5 Stars
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    Customer Photos and Videos
    ACT Xtreme Duty Performance Street Disc Clutch Kit ( Part Number: SB10-XTSS)
    Very grabby, and lots of chatter.  2 months ago
    4out of 5stars

    Installed this clutch along with ACT’s street light flywheel during my 6 speed swap. For starters, the engagement/grab of this clutch compared to a stock WRX clutch is extreme. This thing really grabs tight and fast. Next up is the chatter/shudder. I am getting quite a lot of chatter when releasing the clutch in normal street driving conditions. I’ve found that releasing at a bit higher rpm seems to smooth it out. But that’s not exactly idleal all the time. Also a sharp release doesn’t chatter either. I’m only around 250 miles on this clutch, so we will see if it gets any smoother as it breaks in. Will update if anything changes substantially.
    Was this review helpful?
    ACT Xtreme Duty Performance on Stock horsepower/torque 2005 STI 4 months ago
    5out of 5stars

    so i roasted the stock clutch from bad launches and decided to get this xtreme clutch disc for my "abusive driving" heres a detailed review. pedal feel is about 1.5-2x greater than the stock clutch engagement depending on how strong yo calves are. this thing definitely hooks hard to the point where you can feel the differential clunk in the rear and the entire drive train rattles pretty hard when you press in the clutch too fast at a first gear engagement (its normal dont worry about the noise). I've done alot of launches, not back to back cause i let it cool off now, but this thing has not slipped or failed at all. CONS: definitely dont use this if you got stock horse power or daily drive in stop and go traffic, it fk'ing sucks, alot. I would opt for the "act heavy duty" version, trust me. ALSO: use the OEM STI throw out bearing, this ACT one is garbage and has already failed at less than 10k-16k miles on it, it hasn't really blown up yet, but it sounds like rod knock at idle and it has only gotten worse and more louder.
    Was this review helpful?
    1 of 1 people found the following review helpful
    One of the Best Full-Face Clutch Kits for 400+ WHP 10 months ago
    4out of 5stars

    I have used ACT for a while and have had mixed results with the 5-speed kits on my WRX. When I wen to do a STI transmission swap I was still a little skeptical but chose this clutch anyways. Well the clutch has been awesome so far! I have put about 500 miles on it since the install and it hasn't given me any issues yet. I did the install myself and made sure to take my time and torque it all down correctly and it really paid off. I had almost 0 chatter during break in and now at 500 miles it is completely chatter-free. It drives as easy as any stock clutch with only a stiffer pedal IMHO. I am using this with the stock STI flywheel and it is great!
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    Excellent quality and fantastic performance!! 1 year ago
    5out of 5stars

    The packaging to preserve quality was better than any I have ever seen before. Installs as any other clutch would. Pedal push is heavier than the stock clutch but not nearly as extreme as others have made it sound. I was actually concerned about the weight of the pedal and then pleasantly surprised.. I had some shuddering on engagement for the first 100 break in miles or so, but then it went away and engagements are smooth. I run a 485hp 460tq STI and it holds the power just fine.
    Was this review helpful?
    Act clutch 1 year ago
    5out of 5stars

    Combined with act streetlite flywheel. Grabs better than stock. Engages slightly earlier but I'm over it. Easy to drive on street which is what I do 99% of the time. Overall great upgrade. Can't wait to burn some of it off at the track!
    Was this review helpful?


    • Q: 07 sti with compition lightweight flywheel   Luis 10 months ago

      Will this clutch work with a competition lightweight flywheel on an 07 sti?
    • Q: Is this good for bone stock daily   Trevor 11 months ago

      I have a bone stock 2015 wrx and my throw out bearing is going out and the shop i use recommended getting a whole new clutch i daily it an every now and then do some spirited driving but never launch but in the future ill be going up to around 375 to 400 whp would you guys recommend this for what i use my car for
    • Q: launch  omar3 years ago

      does this clutch will be good for dd and launches and what about the burning smell ??
      • 0 of 0 people found the following answer helpful

        A:  This should be a good clutch for a daily driver. This clutch shouldn't smell bad unless it is being abused.

        Josh P. @ RallySport Direct 3 years ago  
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    • Q: Whats the difference between?  cris_riddle3 years ago

      Whats the difference between the ACT SB10-XTSS and the SB10-HDSS
      • 0 of 0 people found the following answer helpful

        A:  The clutch disc is the same, but the pressure plate included has a higher clamp force on the XT-SS than the HDSS.

        Nick S. @ RallySport Direct 3 years ago  
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