ACT XACT Streetlite Flywheel for 00-09 Honda S2000

The ACT XACT Streetlite flywheel is one of the most impactful bolt-on upgrades you can make to a Honda S2000. The OEM flywheel tips the scales at roughly 20 lbs - the Streetlite comes in at just 11.2 lbs. That 8.8-lb reduction in rotational mass is felt immediately: your F20C or F22C spins up faster, throttle response sharpens, and rev recovery between shifts gets noticeably quicker. On an AP1 pushing toward the 9,000 RPM redline, or an AP2 working the F22C through a canyon, that kind of flywheel response translates directly into a more engaging, connected driving experience.

ACT built the XACT Streetlite as a true one-piece unit from forged chromoly steel. It is CNC machined for dimensional accuracy and dynamically computer balanced for smooth operation at high RPM. The one-piece forged design handles heat better than multi-piece alternatives - it pulls thermal energy out of the friction surface efficiently, which matters on track days and back-to-back drag runs. It also eliminates the two most common failure points on budget flywheels: warped inserts and loose ring gears. The 109-tooth induction-hardened ring gear is built to handle repeated hard starts without wearing out or cracking under load.

This flywheel carries SFI 1.1 certification - independently tested and verified for both street and sanctioned drag racing use. If you run at an NHRA or similar event that requires SFI-certified drivetrain components, the Streetlite checks that box. If you just want a part that has been validated beyond the manufacturer's word alone, SFI 1.1 is your assurance.

Why Upgrade Your S2000 Flywheel?

The S2000's F20C and F22C engines are purpose-built high-revving powerplants, but the stock flywheel is a compromise designed for everyday drivability and cost. It carries more mass than a performance-focused build needs. A lightweight flywheel like the ACT Streetlite reduces the rotational inertia your engine fights against every time you get on the throttle. The result is faster revs on the way up, sharper response when you blip for a downshift, and quicker rev recovery after each gear change. For autocross - where momentum transitions happen in fractions of a second - or for any high-RPM track use past the VTEC crossover, the difference is real and measurable. This is not a marginal gain. It is a fundamental change to how the engine feels to drive. And unlike some race-focused parts, the Streetlite is streetable every day - no chatter, no idle roughness that rules it out for daily driving.

The XACT Streetlite fits all 2000-2009 Honda S2000 models - both the AP1 (F20C, 2.0L) and AP2 (F22C1, 2.2L) - and is backed by a 1-year warranty from date of retail purchase. Install with new OEM flywheel bolts (Honda P/N 90007-PNA-000 or grade 10.9 equivalent) torqued to 76 ft-lbs.

Fits: 2000-2009 Honda S2000 AP1 and AP2 | F20C (2.0L DOHC VTEC) and F22C1 (2.2L DOHC VTEC)