ACT HC4-SPR6 Sport/Race Rigid 6-Pad Clutch Kit for 1990-1991 Honda Civic and CRX

HC4-SPR6 kit features a Sport pressure plate for a nice upgrade. ACT Sport 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 6-pad rigid race discs are made with high quality, ceramic friction materials. The chrome-moly hub is heat-treated for strength and durability. The lightweight, rigid design allows for quicker shifts and smooth, trouble-free service. With the 6-pad rigid race disc, engagement is harsher, but shifting is faster. The 6-pad rigid race disc is recommended for larger clutch sizes to absorb more heat. Sport/Race Rigid 6 Pad Light to moderate pedal effort, aggressive engagement, increased gear rattle; Moderate friction life, extended by ACT's exclusive diaphragm design, rigid design may increase spline wear; Carefully engineered, precisely assembled, accurately balanced, uses select ceramic friction materials for high heat tolerance and maximum performance; Recommended for race use only; 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability

• "Excellence in Performance", backed by the best one-year warranty in the industry!

The ACT HC4-SPR6 Sport/Race Rigid 6-Pad Clutch Kit is engineered for race-focused Honda Civic and CRX applications requiring fast shifts, high heat tolerance, and dependable high-RPM performance. This kit combines an ACT Sport pressure plate with a rigid 6-pad ceramic race disc for aggressive engagement and reliable power transfer in demanding driving conditions.

The ACT Sport pressure plate uses an exclusive diaphragm design to increase clamp load, reduce deflection, and help maximize clutch life. Its diaphragm receives a four-stage heat-treating process, while the precision cover stamping promotes rigidity and consistent operation. The pressure plate is 100% clamp-load tested and dynamically computer balanced for smooth, reliable performance at high engine speeds.

The rigid 6-pad race disc features select ceramic friction material for high heat tolerance and a heat-treated chrome-moly hub for strength and durability. Its lightweight, rigid construction supports quicker shifts and smooth service, although the design produces harsher engagement and increased gear rattle compared with a street-oriented clutch. The rigid disc may also increase spline wear and is recommended for race use only. This ACT clutch kit is designed for light to moderate pedal effort and includes the manufacturer’s one-year warranty.

Fitment includes select 1990-1991 Honda Civic and Honda CRX applications. Verify the vehicle’s engine, transmission, and original clutch specifications before ordering.

Brief Description

Race-oriented 6-pad rigid clutch kit with an ACT Sport pressure plate, ceramic friction material, and heat-treated chrome-moly hub for fast shifting and high-temperature performance.

Key Product Specifications & Technical Data

• Brand: ACT
• Part Number: HC4-SPR6
• Clutch Type: Sport/Race rigid 6-pad
• Pressure Plate: ACT Sport diaphragm design
• Disc Material: Select ceramic friction material
• Hub Construction: Heat-treated chrome-moly
• Balancing: Dynamically computer balanced
• Recommended Use: Race use only

What’s Included

• ACT Sport pressure plate
• Rigid 6-pad ceramic race disc
• Clutch kit components supplied by ACT

Features:

• Sport pressure plate: Exclusive diaphragm design increases clamp load, reduces deflection, and supports extended clutch life.
• Rigid 6-pad race disc: Ceramic friction material provides aggressive engagement, faster shifting, and high heat tolerance.
• Heat-treated chrome-moly hub: Strengthens the disc assembly for demanding race applications and repeated high-RPM use.
• Precision-balanced construction: 100% clamp-load tested and dynamically computer balanced for smooth, reliable operation.

Fitments:
1989 Honda Civic Base
1989 Honda Civic DX
1989 Honda Civic LX
1989 Honda Civic Si
1989 Honda Civic Wagovan
1989 Honda CRX Base
1989 Honda CRX HF
1989 Honda CRX Si
1990 Honda Civic Base
1990 Honda Civic DX
1990 Honda Civic EX
1990 Honda Civic LX
1990 Honda Civic Si
1990 Honda CRX Base
1990 Honda CRX HF
1990 Honda CRX Si
1991 Honda Civic Base
1991 Honda Civic DX
1991 Honda Civic EX
1991 Honda Civic LX
1991 Honda Civic Si
1991 Honda CRX Base
1991 Honda CRX HF
1991 Honda CRX Si

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: false
Units Per Sku: 1