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Details & Features

Understanding ACT's Performance Flywheels

StreetLite

The Streetlite option is a lightweight upgrade designed for performance and affordability, without compromising a smooth idle.

  • Most popular choice
  • Recommended for street and drag racing
  • Optimized driveability and durability
  • Lighter and stronger than stock flywheels
  • Tough, precision-made and dynamically balanced

PROLITE

Prolite flywheels are made for the racer. This version takes the weight reduction concept to a further extreme, offering the best possible acceleration with some minor compromises in idle quality and, in some vehicles, occasional, non-damaging transmission gear rattle.

  • Recommended for road and rally racing
  • Lighter ACT flywheel offering
  • Lowest rotational inertia for best throttle response
  • Tough, precision-made and dynamically balanced

PRO-MASS

Our Pro-Mass flywheel was developed with more inertia for improved climbing and pulling capabilities. Mass distribution techniques give an optimized inertia increase with a minimized weight penalty. ACT flywheels are serviceable and can be resurfaced with no need to purchase additional parts.

  • Confidence-inspiring momentum over obstacles; no gear rattle.
  • Recommended for street and off-road use.

XACT Flywheels Key Features

SFI CERTIFIED

All XACT flywheels are certified as meeting SFI® Spec. 1.1 and are legal for competition in all racing organizations where SFI® Certification is required.

CAD ENGINEERED & FINITE ANALYZED

XACT Flywheels are engineered using the latest CAD and Finite Element Analysis (FEA) software to explore various design alternatives for optimal results.

ONE PIECE CHROME-MOLY FORGING

One-piece chrome-moly forging allows fewer opportunities for failure and promotes uniform, efficient heat transfer from the clutch disc. This is to prevent warped friction inserts or loose ring gears.

SMOOTH OPERATION AT ALL RPMS

ACT demands tight tolerances for fit, concentricity and parallelism so flywheels register precisely to crankshaft centerline, allowing smooth operation at all RPM.

LIGHTER, STRONGER, SAFER

All applications in the XACT Flywheel line are lighter, stronger and safer than OE cast flywheels, meeting the needs of both the enthusiast and hardcore racer.

MORE WEIGHT REDUCTION, ELIMINATED BREAKAGE

Integral, starter ring gear permits more weight reduction where it matters most and eliminates the chance of gear breakage or separation.

OPTIMAL MASS DISTRIBUTION

Flywheel mass is distributed optimally for maximum strength, lower rotational inertia, high thermal tolerance and rigidity.

STRATEGICALLY LIGHTENED

Prolite flywheels are strategically lightened even further, reducing inertia without sacrificing strength or thermal integrity.

THERMAL CAPACITY

XACT Flywheels have excellent thermal capacity by optimized material support behind the friction surface.

LEAD-IN CHAMFERS

Ring gear teeth are cut with lead-in chamfers for first-time starter engagement and to prevent rounded off gear teeth.

DYNAMICALLY COMPUTER BALANCED

Dynamic computer-spin balancing ensure smooth and predictable performance.

HEAT TREATED & TEMPERED

The entire forging is heat-treated and tempered for strength and toughness.