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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 12 Reviews | 11 Q&As
Part # SB10-XTSS
msrp: $809.00

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



    12 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)
    One of the Best Full-Face Clutch Kits for 400+ WHP 6 months ago
    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!
    Was this review helpful?
    Excellent quality and fantastic performance!! 9 months ago
    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
    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?
    1 of 1 people found the following review helpful
    Clamps down well! 1 year ago
    Dropped in a new motor into my 2015 STI and used this clutch to match to the 450wtq. It does the job well done. It grabs the next gear with no fuss during straight line acceleration. It drives similarly to the OEM clutch during daily driving. Initially, this clutch felt significantly heavier over the OEM. It chatters during break-in. Now, with over 5K with this clutch, chatter is virtually non-existent; although, only during slow "going over the speed bump" type of speed. I demanded this to clamp down during a 4500rpm launch, and it obliged to the task with flying colors. Video of the launch below (skip to :40). Happy with this ACT clutch!
    Was this review helpful?
    Great clutch! 2 years ago
    Harry Williams
    I was torn between a few clutches for my new STI, but after driving my buddy's southbend stage 2 I knew i wanted the strong snap of the ACT extreme pp. I had 2 act's and 1 CM on my old WRX and missed the feeling. So far it feels great. I only have 150 miles in it, but it holds power fine. Easy if instillation, well it's a clutch job. But everything installed well and quality is great. I highly recommend this if you prefer a heavier feeling clutch. I daily drive this in NJ traffic and it's fine.
    Was this review helpful?


    • Q: 07 sti with compition lightweight flywheel   Luis 6 months ago

      Will this clutch work with a competition lightweight flywheel on an 07 sti?
    • Q: Is this good for bone stock daily   Trevor 7 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  omar2 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 2 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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