ACT XACT Streetlite Flywheel for 2011–2017 Ford Mustang – ACT600670

600670 is a Streetlite flywheel, which is considerably lighter than stock and is the most durable flywheel offering from ACT. Materials are properly distributed for maximum strength, lower inertia, good heat tolerance and rigidity. ACT's Streetlite flywheels are preferred for street or drag racing. ACT flywheels are serviceable and can be resurfaced with no need to purchase additional parts. XACT Flywheel Streetlite Noticeably improved engine response and acceleration, OE to mild 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 street and 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 Streetlite Flywheel, part number ACT600670, is designed for Ford Mustang applications from 2011 through 2017. This lightweight performance flywheel reduces rotational inertia compared with a stock flywheel, helping improve engine response, throttle feel, and acceleration. It is well suited for street-driven vehicles, performance builds, and drag racing applications where faster revving and dependable clutch engagement are important.

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

The ACT600670 delivers a practical balance of performance and drivability, with noticeably improved engine response and acceleration and only mild gear rattle under typical conditions. It is recommended for street and race use and is backed by ACT’s one-year warranty. This product is intended for automotive applications and carries a California Proposition 65 warning.

Product Specifications and Technical Data

• Brand: ACT
• Part Number: ACT600670
• Product Type: Streetlite performance flywheel
• Construction: One-piece forged design
• Manufacturing Process: CNC machined and dynamically computer balanced
• Ring Gear: Induction-hardened for extended service life
• Recommended Use: Street driving, performance applications, and drag racing
• Serviceability: Resurfacing supported for continued use

What’s Included

• One ACT XACT Streetlite Flywheel
• ACT one-year limited warranty coverage

Fitment: Fits 2011, 2012, 2013, 2014, 2015, 2016, and 2017 Ford Mustang models. Verify vehicle configuration and clutch compatibility before installation.

Features:

• Lightweight design reduces rotational inertia for quicker engine response and improved acceleration.
• Heat-treated forged construction provides strength, toughness, heat tolerance, and rigidity for demanding street or race use.
• One-piece construction supports uniform heat transfer and eliminates loose ring gears and warped inserts.
• Induction-hardened ring gear, CNC machining, and dynamic computer balancing promote long service life and smooth high-RPM operation.

Fitments:
2011 Ford Mustang Base
2012 Ford Mustang Base
2013 Ford Mustang Base
2014 Ford Mustang Base
2015 Ford Mustang V6
2016 Ford Mustang V6
2017 Ford Mustang V6

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