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ACT Heavy Duty Performance Street Disc Clutch Kit 2004-2021 STI / 2007-2009 LGT Spec B

by ACT
Save $244.85 Save $244.85
Original price $945.00
Original price $945.00 - Original price $945.00
Original price $945.00
Current price $700.15
$700.15 - $700.15
Current price $700.15

The SB10-HDSS kit features ACT's most popular Heavy Duty pressure plate and most popular street disc. ACT Heavy Duty pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's Performance street discs are the most popular disc purchased. They feature premium organic materials with high copper content for better heat transfer and steel-backed lining for greater burst strength and durability. These discs feature a reduced marcel for faster shift action to complement ACT pressure plates. Quiet operation with increased strength and reliability. Monoloc is a one-piece, direct replacement or upgrade to the standard, two-piece wedge collar and wire ring featured in pull-type clutches. The spring tension of the segmented retaining ring is carefully calculated and tested for optimal performance. It provides uniform loading on the bearing and pressure plate to assure proper alignment, regardless of driver influence or vehicle modifications. Monoloc's hardened chrome-moly steel construction will provide years of service.

Note: The SB10-HDSS is also the correct fitment for the 2007-2009 Legacy GT Spec B. 

Customer Reviews

Based on 9 reviews
Great Addition

Heavy duty clutch easy and not to bad when driving i enjoy it!


Thank you for your 5 Star Review and for choosing the ACT Heavy Duty Performance Street Disc Clutch Kit. This clutch is a perfect upgrade from OEM and provides unbelievable performance while maintaining that OEM feel. Should you need any assistance in the future, please do not hesitate to reach out to us. Happy driving!


Installed not running

ACT HD, OEM Flywheel, not running yet, need to bleed clutch, inspire of not dis connecting slave cylinder. Further report to follow.


We appreciate your 5 Star Review of the ACT Heavy Duty Performance Street Disc Clutch Kit! The Subimods Team is looking forward to hearing your results once you are up and running! Enjoy!


U guys rock!

Best Cluch out for a daily and a little track trime I can get it up two 497 whp 450 tq and launch like a champ


Thank you for your 5 Star Review! It is great to hear that the ACT Heavy Duty Performance Street Disc Clutch Kit is working so well for your Subaru. The fact that it is suitable for daily driving and track time while supporting your impressive power figures is a fantastic endorsement. Happy driving!


Daniel Cueva
Overall great

Just had some holes in the box but it didn’t affect the products so I’m overall good and fit perfect


Thank you for your 5 Star Review of the ACT Heavy Duty Performance Street Disc Clutch Kit for your STI/LGT Spec B. We appreciate your understanding regarding the box, and we're delighted to hear that the kit fit perfectly. Enjoy the enhanced performance of your vehicles with this clutch kit!


Erick Hernandez
Great product and service.

Everything was great love all your products and the service you guys provide!


We appreciate your kind words and for choosing ACT's Heavy Duty Performance Street Disc Clutch Kit from Subimods. We are delighted to hear that you are satisfied with both the product and the service you received. Thank you for your 5 Star Review! Drive safely and enjoy your vehicle to the fullest!


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