On orders over $100
100% Money Back on Select Parts
Product images
Product Media
ACT StreetLite Flywheel (Part Number: )
ACT StreetLite Flywheel (Part Number: )
ACT StreetLite Flywheel (Part Number: )
ACT StreetLite Flywheel (Part Number: )
Community Media
ACT StreetLite Flywheel (Part Number: )
ACT StreetLite Flywheel
Subaru STI 2004+
Read 11 Reviews | 21 Q&As
Part # 600235
msrp: $458.00

In stock! Ships same day

Features & Product Details

RallySport Direct proudly carries a great selection of quality drivetrain upgrades brought to you by Advanced Clutch Technology.

On this page, you are looking at the ACT StreetLite Flywheel. Lightweight flywheels are a great way to remove rotational mass in the engine which produces faster revs along with more power and performance. 

Here are the details:

  • Properly distributed for maximum strength, lower inertia, along with good heat tolerance and rigidity
  • Precision machined threads
  • Engineered with the latest CAD and Finite Element Analysis software
  • One-piece construction
  • CNC machined and dynamically computer balanced for super smooth high RPM reliability
  • Recommended for street and race use
  • Weighs 15.0 lbs
  • Quickens revs
  • Improves power
  • Improves acceleration
  • Specifications

    Brand: ACT
    SFI Approved: Yes
    Weight: 15.0lbs
    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 -



    11 Reviews
    4.8 out of 5 Stars
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    Customer Photos and Videos
    ACT StreetLite Flywheel ( Part Number: 600235)
     2 years ago
    4out of 5stars

    Great quality. I paired this with an ACT clutch and it's good. Not a free reving as lighter FW I have had, but I had check engine light issues with those in my 2002 WRX.
    Was this review helpful?
    Also installed with Competition Clutch Stage 2 5 years ago
    5out of 5stars

    My '05 STi is running smoother than ever with this combo installed. Engine revs up nice and quick. Didn't notice any noise whatsoever.
    Was this review helpful?
    Sweet! 5 years ago
    5out of 5stars

    Excellent product and no codes thrown!
    Was this review helpful?
    1 of 1 people found the following review helpful
    Installed along with Competition Clutch Stage 2 5 years ago
    5out of 5stars

    I installed this along with Competition Clutch Stage 2 and I'll say that it was quite loud when I first installed it, so much that I actually made a post about it at IWSTI ( [video]), but after it all broke in at around 300 miles, the noise almost completely went away. It's still overall louder than stock, but nothing more than you would expect and very manageable. I'm overall happy with the install and I'm at around 500 miles in now. I'll follow up at 3k miles if I remember.
    Was this review helpful?
    Flywheel Weight? 5 years ago
    5out of 5stars

    Read lots of online posts. They convinced me not go very light. Ended up going with the ACT Streetlight, which is 15.5 lbs vs 18.9 lbs for the stock. For me this turned out to be a great choice! My car is actually smoother from a standstill, shifts smoother, and pulls harder in low gears. I live and drive in flat terrain. If I lived in the mountains I might not feel the same way. But here in SJ, there is no reason not to go this light. Like the CF driveshaft, for me there was no downside to using this weight flywheel and the expected benefits are significant for the small weight change.
    Was this review helpful?


    • Q: 2008 Spec B Fitment  Sap8 months ago

      Your Exedy Lightweight Flywheel - Subaru STI 2004+ MODEL # EXE FF501A states that it fits my 2008 Legacy Spec B but your ACT StreetLite Flywheel - Subaru STI 2004+ MODEL # ACT 600235 states that is does NOT fit my 08SpecB. I'm looking to pair this ACT StreetLite with ACT HD Performance Street Disc Clutch Kit - Subaru STI 2004+ / Legacy GT spec.B 2007-2009 MODEL # ACT SB10-HDSS. Is this possible?
      • 0 of 0 people found the following answer helpful

        A:  This flywheel is only confirmed to fit the STI line, and we cannot confirm fitment for your vehicle at this time.

        Devan M. @ RallySport Direct 8 months ago  
        Was this answer helpful?
    • Q: pilot bearing  nyc_built_sti1 year ago

      does the flywheel come with the pilot bearing or will that be needed to be purchased separately?
      • 0 of 0 people found the following answer helpful

        A:  This flywheel does not come with a new pilot bearing. The pilot bearing is included with the ACT clutch kit.

        Jared A. @ RallySport Direct 1 year ago  
        Was this answer helpful?
    • Q: Southbend  ClayaSTi1 year ago

      Will this Flywheel work with a Southbend stage two clutch?
      • 0 of 0 people found the following answer helpful

        A:  Unfortunately, ACT only confirms fitment for their Flywheels on their Clutches .

        Brady R @ RallySport Direct 1 year ago  
        Was this answer helpful?
    • Q: Act flywheel  Mr.slowwrx1 year ago

      I have a 2012 wrx which I’m doing the STI transmission swap on. I had a act flywheel on my wrx can I swap over just the flywheel to the STI?
    • Q: Exedy clutch  ClayaSTi1 year ago

      Would this flywheel work with an Exedy stage 2 clutch?

    This Part Fits