ACT XACT Prolite Flywheel 600255 for 1990-1999 Mazda Miata

600255 is a Prolite flywheel, which is ACT's lighter flywheel offering with lowest inertia. Prolite flywheels are designed for best throttle response and acceleration. Prolite flywheels are preferred for road racing or rally racing, and have reduced drivability. Materials are properly distributed for maximum strength, good heat tolerance and rigidity. ACT flywheels are serviceable and can be resurfaced with no need to purchase additional parts. XACT Flywheel Prolite Dramatically improved engine response and acceleration, mild to moderate gear rattle; Heat-treated forging for strength and toughness, induction-hardened ring gears for maximum life; One piece construction allows less opportunity for failure and provides uniform efficient heat transfer from the clutch disc. No more warped inserts or loose ring gears; Recommended for race use; Forged, CNC machined and dynamically computer balanced for smooth high RPM reliability

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

The ACT XACT Prolite Flywheel, Part Number 600255, is a lightweight performance flywheel engineered to improve throttle response, engine acceleration, and high-RPM reliability in compatible Mazda Miata applications. Its low-inertia design is well suited for road racing, rally racing, and other performance-focused driving where rapid engine response is a priority. Because of its reduced inertia, this flywheel may provide less forgiving drivability and mild to moderate gear rattle compared with a heavier factory-style flywheel.

ACT manufactures the Prolite flywheel from a heat-treated forging for strength, toughness, heat tolerance, and rigidity. The one-piece construction promotes consistent heat transfer from the clutch disc while eliminating common failure points associated with warped inserts or loose ring gears. An induction-hardened ring gear is designed for extended service life, while CNC machining and dynamic computer balancing support smooth operation at high engine speeds. The ACT 600255 is also serviceable and can be resurfaced, helping extend its useful life without requiring additional replacement parts.

• Feature: Low-inertia Prolite design improves throttle response and acceleration.
• Feature: Heat-treated forged construction provides strength, toughness, and heat resistance.
• Feature: One-piece construction supports uniform heat transfer and reduces potential failure points.
• Feature: CNC machined and dynamically balanced for smooth, reliable high-RPM performance.

Key Product Specifications & Technical Data

• Brand: ACT
• Part Number: 600255
• Product Line: XACT Flywheel Prolite
• Application Type: Automotive performance flywheel
• Construction: Heat-treated forged, one-piece design
• Ring Gear: Induction-hardened for extended durability
• Serviceability: Resurfaceable
• Recommended Use: Race and performance applications

What's Included in the Box

• One ACT XACT Prolite Flywheel, Part Number 600255

Fitment: Designed for select 1990-1999 Mazda Miata applications. Models from 1990-1993 must use a 1.8L clutch with this flywheel. Verify engine, clutch, transmission, and model-year compatibility before installation. ACT backs this product with a one-year warranty.

Features:

• Low-inertia Prolite design improves throttle response and acceleration.
• Heat-treated forged construction provides strength, toughness, and heat resistance.
• One-piece construction supports uniform heat transfer and reduces potential failure points.
• CNC machined and dynamically balanced for smooth, reliable high-RPM performance.

Fitments:
1990 Mazda Miata Base
1991 Mazda Miata Base
1991 Mazda Miata SE
1992 Mazda Miata Base
1993 Mazda Miata Base
1993 Mazda Miata LE
1994 Mazda Miata Base
1994 Mazda Miata M Edition
1995 Mazda Miata Base
1995 Mazda Miata M Edition
1996 Mazda Miata Base
1996 Mazda Miata M Edition
1997 Mazda Miata Base
1997 Mazda Miata M Edition
1997 Mazda Miata STO
1999 Mazda Miata 10th Anniversary
1999 Mazda Miata Base
2000 Mazda Miata Base
2000 Mazda Miata LS
2000 Mazda Miata SE
2001 Mazda Miata Base
2001 Mazda Miata LS
2001 Mazda Miata SE
2002 Mazda Miata Base
2002 Mazda Miata LS
2002 Mazda Miata SE
2003 Mazda Miata Base
2003 Mazda Miata LS
2003 Mazda Miata SE
2003 Mazda Miata Shinsen
2004 Mazda Miata Base
2004 Mazda Miata LS
2004 Mazda Miata Mazdaspeed
2005 Mazda Miata Base
2005 Mazda Miata LS
2005 Mazda Miata Mazdaspeed

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: t
Units Per Sku: 1