The ACT 600870 XACT Streetlite flywheel is built for the 2016-2018 Mazda MX-5 Miata ND, delivering noticeably improved engine response and acceleration with OE-to-mild gear rattle. Heat-treated forging provides strength and toughness, and induction-hardened ring gear teeth maximize service life. The one-piece construction reduces potential failure points and provides uniform, efficient heat transfer away from the clutch disc, eliminating the warped inserts or loose ring gears sometimes seen on multi-piece flywheels. It is forged, CNC-machined, and dynamically computer-balanced for smooth high-RPM reliability and is recommended for both street and race use.
WarrantyInstallation Instructions
Specifications:
- Construction: Heat-treated forged steel, one-piece design
- Ring Gear: Induction-hardened for maximum life
- Balancing: CNC-machined and dynamically computer-balanced
- Engagement: Noticeably improved response, OE to mild gear rattle
- Recommended Use: Street and race use
- Warranty: 1-year ACT limited warranty
- Part Number: ACT600870
Vehicle Applications:
- 2016 Mazda MX-5 Miata Club
- 2016 Mazda MX-5 Miata Grand Touring
- 2016 Mazda MX-5 Miata Sport
- 2017 Mazda MX-5 Miata Club
- 2017 Mazda MX-5 Miata Grand Touring
- 2017 Mazda MX-5 Miata RF Club
- 2017 Mazda MX-5 Miata RF Grand Touring
- 2017 Mazda MX-5 Miata Sport
- 2018 Mazda MX-5 Miata Club
- 2018 Mazda MX-5 Miata Grand Touring
- 2018 Mazda MX-5 Miata RF Club
- 2018 Mazda MX-5 Miata RF Grand Touring
- 2018 Mazda MX-5 Miata Sport
FAQ
What is a Streetlite flywheel designed for?
ACT's Streetlite line is a mid-weight lightweight flywheel intended to noticeably sharpen throttle response and acceleration while keeping OE-to-mild gear rattle, making it suitable for street use as well as track days.
Can the ACT600870 be used for race applications?
Yes, ACT rates the Streetlite flywheel for both street and race use.
Why is the ring gear induction-hardened?
Induction hardening the ring gear teeth increases wear resistance so the starter ring gear holds up to repeated engagements over the life of the flywheel.
Does this flywheel fit the MX-5 Miata RF (retractable fastback)?
Yes, it covers the 2017-2018 RF Club and RF Grand Touring trims in addition to the 2016-2018 Club, Grand Touring, and Sport soft-top trims.
