ACT 6240508-2 6-Pad Sprung Race Clutch Disc 9.4 in 23-Spline Mazdaspeed 3 6

Vehicle Fitment

• 2007-2013 Mazdaspeed 3 (2.3L MZR DISI Turbo DOHC L4)
• 2006-2007 Mazdaspeed 6 (2.3L MZR DISI Turbo DOHC L4)
• Additional Ford, Mazda, Mitsubishi, and Hyundai applications using a 240mm / 23-spline / 1 in input shaft - confirm compatibility with your specific ACT clutch kit part number before ordering separately

Fitment Notes

• This listing is for the clutch disc only - sold individually. Must be used with a compatible ACT pressure plate and flywheel (not included). This disc is engineered as a component of ACT's conversion clutch system for the Mazdaspeed 3/6 platform and related applications. It is the friction disc included in ACT clutch kits ZX4-HDG6 and ZX4-XTG6, among others.
• The "-2" suffix designates a specific hub configuration variant within the 6240508 disc family. Always verify your complete kit's disc part number before ordering this disc as a standalone replacement.
• Verify disc diameter (240mm / 9.4 in), spline count (23), and input shaft diameter (1 in) match your transmission specification before ordering.
• Recommended for high-horsepower street or race use. The 6-pad sprung design is more aggressive than a full-face organic street disc - engagement is harsher and gear rattle at idle is expected. ACT recommends organic street discs for daily-driven street-only applications.

Features

• 6-Pad Spring-Centered (Sprung) Race Design: The spring-centered hub damps torsional vibrations and resists failure under harsh race conditions - providing a middle ground between the drivability of a full-face organic disc and the outright response of a rigid-hub race disc. Engagement is aggressive and shifting is faster than a street disc, while the sprung hub reduces driveline shock compared to a solid-hub design.
• Premium Ceramic Friction Materials: High-quality ceramic pads deliver high heat tolerance and a high coefficient of friction, maintaining consistent grip and torque capacity under the elevated temperatures of track use and high-power Mazdaspeed builds. Ceramic materials hold approximately 28% more torque than typical organic materials at equivalent disc size.
• 6-Pad Configuration for Heat Management: Six friction pads distribute contact load across a wider area compared to a 4-pad disc, improving heat absorption and extending pad service life under sustained race conditions.
• Wraparound Spring Windows and Thicker Retainer Stampings: ACT's spring retainer design provides enhanced spring support, reduces stress concentrations at the window edges - a common failure point - and increases overall strength and reliability of the spring-center assembly under repeated high-load engagement.
• Heat-Treated Spring Steel Drive Plate: The drive plate is manufactured from spring steel and heat-treated for strength, resisting bending, fatigue, and deformation under sustained high-torque operation.
• Carefully Broached Splines: Precision-broached splines ensure an exact fit onto the transmission input shaft for consistent clutch release and long spline life.
• SFI Certified: Meets SFI safety standards for performance and competition clutch disc applications.

Specifications

• Part Number: 6240508-2
• Brand: ACT (Advanced Clutch Technology)
• Component Type: 6-Pad Spring-Centered (Sprung) Race Clutch Disc (Disc Only)
• Disc Diameter: 9.449 in (240mm)
• Disc Type: Sprung (Spring-Centered) - 6-Pad
• Disc Material: Ceramic
• Input Spline Count: 23
• Input Shaft Diameter: 1 in (1.000 in)
• Recommended Use: High-horsepower street or race use
• Warranty: 1 Year from Retail Purchase

Included Components

• 1x ACT 6-Pad Spring-Centered Race Clutch Disc

Product Description

The ACT 6240508-2 is a 6-pad spring-centered (sprung) ceramic race clutch disc for 240mm / 23-spline / 1 in input shaft applications - primarily the 2007-2013 Mazdaspeed 3 and 2006-2007 Mazdaspeed 6 equipped with the 2.3L MZR DISI turbocharged engine. It is the friction disc component included in ACT's ZX4-HDG6 and ZX4-XTG6 clutch kits and is available separately for builds requiring only disc replacement. This disc must be paired with a compatible ACT pressure plate and flywheel - it is not designed for use with the OEM Mazdaspeed modular clutch components.

The sprung 6-pad ceramic design represents a performance step up from ACT's organic Performance Street disc, offering greater heat tolerance and torque capacity while retaining the torsional dampening of a spring-centered hub - making it more usable under real-world conditions than a rigid-hub race disc. Engagement is noticeably more aggressive than stock, with mild to moderate gear rattle at idle. ACT rates this disc for high-horsepower street and race use, and it is a popular choice in modified Mazdaspeed 3 builds running significant boost upgrades. Sold individually.