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ACT Performance Street Disc Replacement SB4 (Part Number: )
ACT Performance Street Disc Replacement SB4 (Part Number: )
ACT Performance Street Disc Replacement SB4 (Part Number: )
ACT Performance Street Disc Replacement SB4 (Part Number: )
ACT Performance Street Disc Replacement SB4 (Part Number: )
ACT Performance Street Disc Replacement SB4
Subaru STI 2004+
Read 1 Reviews | 2 Q&As
Part # 3000503
msrp: $199.00

In stock! Ships same day

Features & Product Details

RallySport Direct carries a massive collection of Advanced Clutch Technology kits and replaceable components for those of you who need to keep your car making optimal power and performance. 

On this page, you are looking at the ACT Performance Street Disc Replacement.

Here are the details:

  • Made to exceed OEM specifications to allow your clutch to hold more torque and last longer
  • Direct replacement piece for the disc that is included with the ACT Clutch Kit
  • Great alternative for those of you that have a pressure plate and release bearing that is still in good operating shape
  • Replacement for ACT SB4 part numbers.


    Brand: ACT
    Disc Material: Organic
    Disc Style: Solid
    Disc Type: Sprung Hub
    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 -



    1 Reviews
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    1 of 1 people found the following review helpful
    Holding up well. 4 years ago
    5out of 5stars

    Holding up great for 9 months now and counting, Done plenty of launches pushing over 400hp and haven't had a complaint yet.
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    • Q: will this clutch hold up  ben09sti500whp5 years ago

      my sti has 425whp 26lb of boost and i have a act racing clutch in it and its starting to go after 10000 miles is it good to stick with this clutch? or should i upgrade to something stronger to handle the boost
      • 0 of 0 people found the following answer helpful

        A:  If you are constantly racing the car such as power shifting and hard launching, you might want to consider getting a multi disc clutch that can hold up to more abuse. 10,000 is not much on a clutch so if you are wearing it out that fast you might want to consider other options or reduce the amount of stress that the clutch is put through.

        Kirill C. @ RallySport Direct 5 years ago  
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    • Q: Firment  tcwedge93473326 years ago

      Do I need a whole clutch kit when I replace my clutch? Or will one of these just mate up to the stock components? If not then why?
      • 1 of 1 people found the following answer helpful

        A:  You can use this disc as a stock replacement, however it is highly recommended you use a new, full kit, and either get a new flywheel, or have the old flywheel turned. Reason is that the disc, flywheel and pressure plate will form grooves with eachother, and with just a new disc and old pressure plate or flywheel, you will not get 100% contact between the surfaces.

        Zach G. @ RallySport Direct 6 years ago  
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