ACT BM17-XTR4 Extreme Race Rigid Clutch Kit - 4-Pad

The ACT BM17-XTR4 is a competition-grade clutch kit built for maximum performance under the most demanding race conditions. This Xtreme Race Rigid 4-Pad clutch kit pairs an ACT Xtreme pressure plate with a ceramic 4-pad rigid race disc, delivering aggressive engagement, lightning-fast shifts, and exceptional heat tolerance. Recommended for race use only.

Xtreme Pressure Plate:

• Exclusive diaphragm design increases clamp load, reduces deflection, and maximizes clutch life
• All diaphragms undergo a rigorous four-stage heat-treating process for unparalleled durability
• Precision cover stampings provide rigidity and consistency under high-load conditions
• Delivers a 50–80% increase in pedal effort over stock, reflecting true race-spec clamping force
• 100% clamp load tested and dynamically computer balanced to within 0.25 oz-in for smooth, reliable high-RPM operation

4-Pad Rigid Race Disc:

• Select ceramic friction materials engineered for high heat tolerance and maximum performance
• Chrome-moly hub is heat-treated for added strength and durability
• Lightweight rigid design enables quicker shifts and aggressive, precise engagement
• Well-suited for smaller disc sizes found in smaller displacement engines
• Rigid design eliminates dampening for faster, more direct power transfer — note that increased gear rattle and spline wear are expected in race applications

Important Kit Notes:

• Conversion kit — must be used with ACT flywheel 601011 or 601016 (not included)
• M8-1.25 x 20mm pressure plate bolts included
• Moderate friction life; ACT's exclusive diaphragm design helps extend service intervals
• Race discs require only a few firm slips to lap in friction surfaces prior to use

The ACT BM17-XTR4 clutch kit is the go-to choice for racers who demand the fastest possible shift response and uncompromising clamping force. Built with the same precision engineering that has supported championships worldwide, this kit is carefully assembled and accurately balanced for consistent, race-proven reliability.