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Competition Clutch Lightweight Flywheel (Part Number: )
Competition Clutch Lightweight Flywheel (Part Number: )
Competition Clutch Lightweight Flywheel (Part Number: )
Competition Clutch Lightweight Flywheel (Part Number: )
Community Media
Competition Clutch Lightweight Flywheel (Part Number: )
Competition Clutch Lightweight Flywheel
Subaru STI 2004+
Read 7 Reviews | 12 Q&As
Part # 2-721-ST
msrp: $395.01

In stock! Ships same day

Features & Product Details

RallySport Direct is proud to carry the Competition Clutch Lightweight Flywheel. Lightweight Flywheels improve the performance because the lighter they are, the less rotational mass will be had at the crank. This means that you will have faster revs and improved engine response. This particular flywheel will work with all performance and stock clutch assemblies. 

Here are more details:

  • Qualities of the CCI Lightweight Steel Flywheel:
  • Preserves low-end torque and driveability
  • One piece ring gear for high durability
  • Well suited for Stage 1 and Stage 2 clutch kit applications
  • Stamped with 4140 plate with 2000 ton pressure at 1260 degrees
  • CNC machined and balanced to O.E. specifications
  • Weighs 15lbs

  • Meets and exceeds SFI 1.5


    Brand: Competition Clutch
    SFI Approved: Yes
    Weight: 15.0lbs
    Mfgr. Warranty: 90 Days
    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



    7 Reviews
    4.7 out of 5 Stars
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    Customer Photos and Videos
    Competition Clutch Lightweight Flywheel ( Part Number: 2-721-ST)
    Good product some vibration at first 2 years ago
    4out of 5stars

    I have a light drive train, aluminum, drive shaft, Perrin vibration dampener, and this light flywheel. No codes and easy to takeoff from stop. No vibrations detected, when assembled by shop. Immediately drove on 1200mile trip. When very hot and taking off the clutch made large vibration. I think the mechanics that installed parts gunned it around town before I got it. I took it easy and it is close enough to stock quiet that I'm happy. Noticed some improved revs and some more performance.
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    Awesome 4 years ago
    5out of 5stars

    Had it for about 500 miles. Took a little getting used to in low RPMs and RPMs drop a little more between shifts.
    Was this review helpful?
    Great flywheel 4 years ago
    5out of 5stars

    I paired this with a Stage 3 CC clutch. I did notice more vibrations around 2700 rpms and up. Between shifts the rpms do drop a little quicker. It did make a little difference in low rpm drivability. Now with 1500 miles the vibrations have subsided and it's almost back to stock.
    Was this review helpful?
    Nice 5 years ago
    5out of 5stars

    No cel code, but you do have to rev it just a little higher to engauge, 200rpms max. Kinda a pain in stop and go traffic but I did the stage 2. Will update when It's broken in more.
    Was this review helpful?
    Good product 5 years ago
    5out of 5stars

    Lighter. Perfect fitment. Not too light to require heeltoe on daily drive
    Was this review helpful?


    • Q: Exedy stage 1 heavy duty + CC flywheel  Vincent13 days ago

      Will this flywheel be compatible with the exedy stage 1 heavy duty clutch?
    • Q: Resurfacing?  JaviG5 months ago

      I bought a Competition Clutch 1.5 stage with Lightweight Flywheel kit about 3 years ago. Unfortunately my transmission broke 2nd gear on my daily driver. So I was thinking to use the CC OEM clutch 8037-STOCK and reuse the existing flywheel. Any recommendations? Resurface or Not? Buy new one? OUCH?
    • Q: Fitment  Justin10 months ago

      Will this work with an ACT extreme duty 6 puck?
      • 0 of 0 people found the following answer helpful

        A:  This flywheel is only confirmed to fit Competition Clutch clutch kits. You will need to use ACT's flywheel with your ACT Extreme Duty 6 Puck.

        Jared A. @ RallySport Direct 10 months ago  
        Was this answer helpful?
    • Q: some info please  Robbie083112 months ago

      im about to make a purchase for your CC stage 4 clutch kit. im currently stock and im not that concerned about it being rough till i modify my car but would this flywheel match well with CC stage 4 clutch kit? Thank you in advance for your response!
      • 0 of 0 people found the following answer helpful

        A:  This will work well with the stage 4 kit, but puck clutches can be a bit more rough and tricky to drive, especially with a light flywheel. If your power goals are within their rating, Comp's Stage 2-3 kits will be a bit less harsh.

        Marcus E. @ RallySport Direct 10 months ago  
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    • Q: N/A vs Turbo  zeus122376046022 years ago

      Greetings. I noticed that they recommend this flywheel for use on N/A setups. Why is this? Can this be run on a turbo charged car? Thanks.

    This Part Fits