ACT 4240018
ACT 4240018
ACT 4240018
ACT 4240018


ACT® (04-21) WRX STI 4 Pad Rigid Race Disc

Regular price$141.00
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Compatible: (2.5L)

2004 - 2021 Subaru WRX STI  


4240018 is a 4-pad rigid race disc made with high quality, ceramic friction materials. The disc engagement is harsher, but shifting is faster. The race disc features top grade rivets to securely fasten the part together. The rivet design and materials are carefully selected for maximum strength. The 4-pad rigid race disc is well-suited for the smaller disc sizes in smaller engines.

Feel Aggressive engagement, quickest shifts, increased gear rattle
Life Premium ceramic friction materials provide moderate wear rates and high heat tolerance, rigid design may increase spline wear
Quality Lightweight rigid design, chromoly hub is heat-treated for strength and durability
Recommended Use Recommended for race use only
ACT Difference High burst strength and holds 28% more torque than typical organic materials



Item Description 4 Pad Rigid Race Disc
Product Weight (lbs.) 1.9
Disc Material Ceramic
Diameter (Inches) 9.4
Diameter (Millimeters) 240
Warranty 12 Months 
SFI 1.1

Install Guide: