ACT 1990 Mazda Miata 4 Pad Sprung Race Disc

ACT 1990 Mazda Miata 4 Pad Sprung Race Disc | 4200105

This product is a 4-pad spring-centered race disc made with high quality, ceramic friction materials. The engagement is harsher, but shifting is faster. The heavy duty torsional dampening springs are stronger, in most cases, than standard springs and are provided in the best sizes and spring rates to suit the application. The race disc features a heat-treated spring steel drive plate and is well-suited for the smaller disc sizes in.

Use ACT manufacturer part number 4200105 to confirm the exact drivetrain component and application.

Key Features

• is a 4-pad spring-centered race disc made with high quality, ceramic friction materials.
• The race disc features a heat-treated spring steel drive plate and is well-suited for the smaller disc sizes in smaller engines.
• The heavy duty torsional dampening springs are stronger, in most cases, than standard springs and are provided in the best sizes and spring rates to suit the application.

Fitment

Vehicle fitment is a starting point. Confirm every drivetrain specification and the exact ACT part number before installation.

Confirm 4200105 against the complete ACT application before ordering.

Specifications

Manufacturer Part Number: 4200105

Whats Included

The exact ACT clutch disc and quantity identified by the product title and MPN. Bearings, alignment tools, flywheel bolts, pressure-plate bolts, hydraulic parts, and related hardware are included only when specifically stated.

About ACT

ACT develops application-specific clutch kits, friction discs, pressure plates, flywheels, bearings, and supporting drivetrain components for street and motorsport use. Black Ops Auto Works organizes every ACT listing by exact MPN and verified vehicle application.

The 4200105 should be selected as part of a complete matched ACT drivetrain system.

Related Parts

• ACT 1992 Acura Integra Perf Street Sprung Disc
• ACT 2000 Honda S2000 Perf Street Sprung Disc
• Shop the complete ACT clutch and drivetrain collection

Frequently Asked Questions

What is the 4200105?

It is the ACT clutch disc described in this listing for the stated application and use.

How do I confirm fitment?

Match the complete year, make, model, engine, transmission and every qualifier shown in the title and fitment section.

Is this intended for street use?

This listing contains a race-oriented or not-for-street-use designation. Follow ACTs stated use and drivability guidance.

Can I mix clutch components from different kits?

Do not assume components are interchangeable. Verify spline, diameter, step height, release system and the complete matched ACT assembly.

Does installation require break-in?

Follow the current ACT instructions for the exact clutch and disc type. Street friction systems commonly require a controlled break-in period; race products can differ.

Should the flywheel be inspected or resurfaced?

Yes. Inspect the mating surface and use only a compatible flywheel prepared to ACT specifications. Replace damaged or out-of-spec components.

Is professional installation recommended?

Yes. Clutch and flywheel work requires correct transmission removal, fastener torque, alignment, release-system setup and safety procedures.

Can Black Ops Auto Works help verify the application?

Yes. Provide the vehicle, engine, transmission, existing flywheel, power level and intended street or competition use before ordering.

Installation Instructions

1. Confirm ACT part and the complete engine, transmission, flywheel, spline, and release-system application before disassembly.
2. Inspect every component and compare the new part with the removed assembly before modifying or installing anything.
3. Inspect the flywheel or friction surface, pilot support, release bearing, fork, pivot, hydraulic system, seals, and mounting hardware.
4. Clean friction surfaces correctly and keep oil, grease, and fingerprints away from the clutch disc and mating faces.
5. Use the vehicle service procedure and current ACT instructions for alignment, fasteners, torque sequence, release travel, and clearances.
6. Verify smooth release, correct free play, clean gear engagement, and leak-free operation before road use.
7. Complete the manufacturer-specified break-in procedure before launches, dyno pulls, racing, towing, or full-torque operation.

California Proposition 65: WARNING: This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.