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ACT Heavy-Duty Clutch Kits for 1990-1993 MIATA - ZM1-HDR4
Part Number: ACL-ZM1-HDR4
Clutch Kit, .937 in. Diameter Shaft, 22-Spline, 7.875 in. Diameter Disc, 4-Paddle, Mazda, Kit
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Estimated Ship Date: Oct 23, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
ZM1-HDR4
Part Type:
Product Line:
Summit Racing Part Number:
ACL-ZM1-HDR4
UPC:
00837055008879
Clutch Usage:
Performance
Clutch Disc Quantity:
1
Flywheel Included:
No
Input Spline Quantity:
22
Input Shaft Diameter:
0.937 in.
Disc Diameter (in.):
7.875 in.
Disc Diameter (mm):
200mm
Disc Material:
Ceramic
Disc Style:
4-paddle
Hub Style:
Solid
Pressure Plate Style:
Diaphragm
Throwout Bearing Included:
Yes
Alignment Tool Included:
Yes
Pilot Bushing Included:
Yes
Counterweight Assist:
No
Mounting Hardware Included:
No
Quantity:
Sold as a kit.
ACT Heavy-Duty Clutch Kits
ACT heavy-duty clutch kits offer a clamp load increase of 20 to 50 percent over OEM, significantly increasing torque capacity. The pedal feel with these clutches varies from stock to a moderate increase. Available for street and race applications, many are SFI-certified to ensure safety.
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Some parts are not legal for use in California or other states with similar laws / regulations
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