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ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
Community Media
User Media for: ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
User Media for: ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
User Media for: ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
User Media for: ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
User Media for: ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
User Media for: ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
User Media for: ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
User Media for: ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
User Media for: ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009
User Media for: ACT Xtreme Duty Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009

ACT Xtreme Duty Performance Street Disc Clutch Kit

Subaru STI 2004+ / Legacy GT spec.B 2007-2009

Read 15 Reviews | 15 Q&As
Part # SB10-XTSS
$728.00
msrp: $933.00

In stock!
Ships within 24 hours
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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 needs a clutch that is strong enough to handle the power in your 04+ Subaru STI or 07-09 Forester! 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 maximize clutch life. The diaphragm endures a four-stage heat-treating process to deliver optimal performance in demanding conditions. 

DETAILS:

  • 60% Torque capacity over OEM
  • Torque capacity of 590lbs
  • Disc diameter of 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
  • CONTENTS INCLUDE:

  • 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
    WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    PEOPLE WHO VIEWED THIS ITEM ALSO VIEWED

    REVIEWS & CUSTOMER MEDIA

    15 Reviews
    4.5 out of 5 Stars
    5 Stars
    (11)
    4 Stars
    (3)
    3 Stars
    (0)
    2 Stars
    (0)
    1 Stars
    (1)
    Customer Photos and Videos
    ACT Xtreme Duty Performance Street Disc Clutch Kit ( Part Number: SB10-XTSS)
    ACT Xtreme Duty Performance Street Disc Clutch Kit ( Part Number: SB10-XTSS)
    ACT Xtreme Duty Performance Street Disc Clutch Kit ( Part Number: SB10-XTSS)
    ACT Xtreme Duty Performance Street Disc Clutch Kit ( Part Number: SB10-XTSS)
    ACT Xtreme Duty Performance Street Disc Clutch Kit ( Part Number: SB10-XTSS)
    ACT Xtreme Duty Performance Street Disc Clutch Kit ( Part Number: SB10-XTSS)
    ACT Xtreme Duty Performance Street Disc Clutch Kit ( Part Number: SB10-XTSS)
    ACT Xtreme Duty Performance Street Disc Clutch Kit ( Part Number: SB10-XTSS)
    ACT Xtreme Duty Performance Street Disc Clutch Kit ( Part Number: SB10-XTSS)
    ACT Xtreme Duty Performance Street Disc Clutch Kit ( Part Number: SB10-XTSS)
    5 of 8 people found the following review helpful
    **UPDATE AFTER ABUSIVE USE*** PLEASE READ....ACT Xtreme Duty Performance on Stock horsepower/torque 2005 STI 3 years ago
    5out of 5stars
    Calvin
    QUICK BACKSTORY: clutch installed at around APRIL 2017 @ approx. 115k miles~~ WITH JDM TRANSMISSION (lower 5th & 6th gear ratio) Clutch FAILURE occurred @ JANUARY 2019 @ 149k miles. There was a throw out bearing noise that began to progressively get worse (sounds like rod knock and goes away when clutch pedal is pressed in) near the failure point when my clutch splines GRENADED (see attached pictures) it started rattling even harder and sounded like rod knock. [Symptoms: EXCESSIVELY LOUD ROD KNOCK NOISE (VERY PRESENT WHEN CAR IS FACED DOWNHILL FOR SOME REASON)- GONE WHEN CLUTCH PEDAL IS PRESSED IN, GEAR SHIFTS PROGRESSIVELY BEGAN TO START GRINDING OUT OF NO WHERE EVEN WITH PEDAL FULLY PRESSED DOWN.] Now too the fun part: So basically I did a spirited cruise, had to end up double clutching to make it home. Next morning, literally no gear shifts available - could only put the car in gear with engine off and start it to move it around. I ended up frustrated that I spent 'X' amount for this 'heavy duty' performance clutch that should have handled the abuse no problems. Spent about 4 hours trying to separate the engine and transmission and obviously it would not separate based on the pictures and the video. I ended up hammering pry bars to separate the engine block & transmission far enough to loosen all 9 pressure plate bolts and the engine fell right out. NOW, I don't know why my splines look rounded off obviously this clutch cant take abuse from a motor making stock horse power because this time around I actually properly slipped the clutch @ 5500+ rpms for launches. Honestly very disappointing, Now I don't know if the JDM transmission splines are different from USDM or not, cannot verify that. I attached a picture with a stock OEM Exedy replacement clutch to show you guys the spline height to clutch height. Now this may or may not happen to your guys clutch - I honestly don't know what caused this problem aside from dumping the clutch in rainy conditions to launch it or spirited drivings or speed shifting gears or a couple drag races. Alls I want to do is give information to you before you make this purchase, cause if I had to do this again I probably would not buy this clutch. -- THE REPAIR> I attempted to use a puller--the pressure plate caved in severely so obviously that was a bust. I ended up using a M18 Milwaukee 4" cutting disc to basically cut out the front clutch disc, than cut out the pressure plate, than cut into the messed up spline portion until i could chisel it apart. I ACCIDENTALLY cut into my transmission splines, took off a small chunk but Im just ganna send it with the stock clutch - will probably update this if that causes another failure. Again, not ragging on ACT, but Im probably never going to purchase from this brand again. Very dissapointed. If any of you guys at RSD could figure out the cause/failure & update me that would be cool. Even made a youtube account just to post the video for your guys entertainment.
      
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    3 of 3 people found the following review helpful
    Very grabby, and lots of chatter.  4 years ago
    4out of 5stars
    1967Friend.
    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.
      
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    2 of 3 people found the following review helpful
    ACT Xtreme Duty Performance on Stock horsepower/torque 2005 STI 4 years ago
    5out of 5stars
    Calvin
    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.
      
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    2 of 2 people found the following review helpful
    One of the Best Full-Face Clutch Kits for 400+ WHP 4 years ago
    4out of 5stars
    D3LTAwrx
    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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    4 of 4 people found the following review helpful
    Excellent quality and fantastic performance!! 4 years ago
    5out of 5stars
    jeepman
    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.
      
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    QUESTIONS & ANSWERS

    • Q: 04 WRX   Fitment? 2 years ago

      What specific flywheels are compatible with this clutch kit? Will XACT Streetlite Flywheel part # 600175 fit?
      • 0 of 0 people found the following answer helpful

        A:  This clutch kit will not fit your 2004 WRX. You will need Part #ACTSB9-XTSS. The flywheel you mentioned will work with the part number I just listed.

        Jfonts
          
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    • Q: Fully built STI  2004FullybuiltIAGSTI2 years ago

      04 STI Fully built motors 500 torque 570 HP Stage 2 south bend lasted 6,000 miles Do not launch my car , car has been down 3 weeks due to clutch and I’m torn from mixed reviews on all clutches. Don’t drag it manly cruising and mountains . Not a daily due to work . What clutch ? act ? Why isn’t there a combo for the 04 sti clutch flywheel and bolts ? I’m more for the heavy aggressive feel than the feather or stick feel. Help ! was told competition stage 3 segmented is what I need . Keep stock fly wheel? Questions.
      • 0 of 0 people found the following answer helpful

        A:  Honestly for the power your car is making, I don't think this clutch will be the one you want. Going with something like the ACT 6-puck heavy duty would likely be the way to go. With that you are going to get the holding power, but also harsher engagements and a bit more chatter, but with the power involved, i would ecpect the 6-puck to last quite a bit longer than an organic disc like this one. Also I would recommend going with an aftermarket flywheel for sure, something like the ACT Streetlite would be perfect. Thanks!

        Rick C. @ RallySport Direct 2 years ago  
          
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    • Q: Clutch life?  Awag243 years ago

      How long will this clutch last if not abused?
      • 1 of 1 people found the following answer helpful

        A:  Durability can vary on a lot of factors and driving style. It can last from 0 to 90,000 miles.

        Michael N.
          
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    • Q: Xtreme duty clutch  Awag243 years ago

      How long does it take the clutch it break in? How many miles do I need to put on till I can wot?
      • 0 of 0 people found the following answer helpful

        A:  With correct install the clutch break-in can be around 500 miles.

        Michael N.
          
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    This Part Fits

    Subaru Legacy
    GT spec.B
    2007 Subaru Legacy GT spec.B
    Requires STI Flywheel
    2008 Subaru Legacy GT spec.B
    Requires STI Flywheel
    2009 Subaru Legacy GT spec.B
    Requires STI Flywheel