Details & Features
Understanding ACT's Performance Flywheels
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
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
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
- Smooth, quiet operation; no gear rattle
- Recommended for street, towing and off-road use
- Tough, precision-made and dynamically balanced
STREET-MASS
ACT Street-Mass flywheels are developed with a minimal to moderate change in inertia to ensure better performance, safety, and durability when the factory design is inappropriate. ACT flywheels are serviceable and can be resurfaced with no need to purchase additional parts.
- Replaces factory dual-mass design (where applicable)
- Inertia and drivability are closest to stock
- Recommended for general street and off-road use
- Tough, precision-made and dynamically balanced
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.