ACT

ACT 04-20 WRX STI Mod Twin HD Race Kit Sprung Mono-Drive Hub Torque Cap 895ft/lbs Not For Street Use - T1R-S05

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SKU:
ACTT1R-S05
UPC:
842385025304
MPN:
T1R-S05
Availability:
Regularly stocked product
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MSRP: $2,598.00
$2,104.00
— You save $494.00
Current Stock: 1

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Description

What is the typical lifespan of a ACT Mod-Twin Clutch Kit?
ACT Mod-Twin Clutch Kits deliver extreme engagement and rapid power transfer, designed for demanding motorsport applications, ensuring unmatched durability and reliability.

Is professional installation recommended for the ACT Mod-Twin Clutch Kit?
Professional installation is highly recommended for the ACT Mod-Twin Clutch Kit to ensure precise setup and optimal performance, crucial for race-winning launches.

ACT Mod-Twin Kits provide unparalleled grip and power handling, essential for demanding motorsport applications with a score of 10 for Racing Competition. Experience twice the ceramic friction surfaces, complemented by an ultra-durable Mono-Drive sprung hub assembly. Trust ACT for race-winning performance and superior heat dissipation.

What Owners Say

Owners and enthusiasts consistently praise the ACT Mod-Twin for its surprisingly light, stock-like pedal feel, a significant improvement over the heavier ACT 2900. The full-face organic disc setup delivers manageable street manners while handling serious power, with users reporting solid performance in builds exceeding 500 horsepower. Installation appears straightforward when paired with quality transmissions like the TRE. However, some caution that the heavier disc and hub assembly may not be ideal for dedicated drag racing applications where rapid engagement is critical. Despite this specific limitation, the kit has earned respect in the Evolution and Subaru communities as a capable twin-disc option that balances daily drivability with track-ready performance.

Key Features

  • Mod-Twin 225 HD Sprung Race Kit
  • twice the ceramic friction surfaces
  • ultra-durable Mono-Drive sprung hub assembly
  • completely modular design
  • puck-style Friction Plates with high quality ceramic friction materials
  • CNC-machined and dynamically balanced flywheel

Why Choose the ACT Mod-Twin Kits

Delivers extreme engagement and rapid power transfer for race-winning launches.

Achieves superior heat dissipation and consistent performance under extreme track conditions.

Provides unmatched durability and reliability for demanding motorsport applications.

Transforms your drivetrain with a customizable setup for optimal race tuning.

Who Is This For?

Track / Autocross — 9/10
Designed for race use with enhanced grip and power handling.

Drag Racing — 9/10
Twice the ceramic friction surfaces for superior power transfer.

Racing Competition — 10/10
Explicitly positioned as race_only with high-performance features.

Street Performance — 4/10
Race-only positioning suggests potential compromise in street comfort.

Daily Driving Comfort — 1/10
Race-only design is not optimized for daily driving comfort.

Easy DIY Install — 2/10
Install type is unknown, likely complex for a multi-plate clutch.

Frequently Asked Questions

How do I confirm if the ACT Mod-Twin Kit fits my vehicle?

Confirm fitment with your vehicle by consulting a qualified technician or using the official fitment guide. This ensures optimal integration of the Mod-Twin 225 HD Sprung Race Kit. Professional verification guarantees precise compatibility for your specific make and model.

What is the installation difficulty for ACT Mod-Twin Kits?

Professional installation is recommended for ACT Mod-Twin Kits due to their complex multi-plate design. This ensures proper setup and calibration. Following this guidance guarantees a successful and reliable performance upgrade.

What performance outcome can I expect from the ACT Mod-Twin Kit for racing?

Achieve a "Racing Competition" use case score of 10 with the ACT Mod-Twin Kit. Its twice the ceramic friction surfaces deliver extreme engagement and rapid power transfer for race-winning launches. Experience unparalleled grip and power handling for competitive motorsport events.

What maintenance level is associated with ACT Mod-Twin Kits?

ACT Mod-Twin Kits require an advanced maintenance level due to their specialized design. This is consistent with their positioning for dedicated racers seeking maximum grip and power handling. Proper care ensures sustained peak performance for competitive use.

Additional Resources

Official ACT Product Page

Installation Guide (PDF)

Important Notices

⚠️ Proposition 65 Warning: This product can expose you to chemicals including lead and/or other substances known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

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Additional Information

Clearance Item:
N
MPN:
T1R-S05
Proposition 65:
Y
Case Lot Quantity:
1
Category:
Drivetrain>Clutch Kits - Multi
Product Level:
Race Only
Track / Autocross:
9/10
Drag Racing:
9/10
Racing Competition:
10/10
Street Performance:
4/10
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