ACT 600290 XACT Streetlite Flywheel for 1990-2005 Mazda Miata / MX-5

Vehicle Fitment

• 1990-2005 Mazda Miata / MX-5 (Various trims, Manual Transmission)

Features

• Lightweight Streetlite flywheel boosts engine response and acceleration
• Forged chromoly steel construction for strength and reduced inertia
• Induction-hardened ring gear for enhanced durability and gear life
• One-piece CNC-machined design ensures uniform heat transfer
• Dynamic balancing delivers smooth high-RPM operation
• Recommended for street and drag racing use
• Serviceable - can be resurfaced for future maintenance
• Noticeable performance improvement over stock flywheel

Specifications

• Flywheel Type: XACT Streetlite performance
• Material: Forged chromoly steel
• Friction Surface Diameter: 8.8 in / 225 mm
• Tooth Count: 112
• Product Weight: ~13.7 lbs (lighter than stock)
• SFI Rating: 1.1 certified
• Mounting Holes: 6
• Compatible Engine Sizes: 1.6 L-1.8 L I4 (NA) manual transmission

Included Components

• 1x XACT Streetlite flywheel (ACT 600290)

Product Description

The ACT 600290 XACT Streetlite Flywheel is a lightweight, high-strength performance flywheel engineered specifically for Mazda Miata / MX-5 vehicles produced from 1990 through 2005. Constructed from forged chromoly steel with an induction-hardened ring gear, the Streetlite flywheel significantly reduces rotational mass compared to the stock flywheel, resulting in quicker engine response and improved acceleration. Its one-piece CNC-machined design provides uniform heat transfer and excellent durability under spirited driving conditions.

Dynamically balanced for smooth operation at high RPMs and recommended for both street and occasional drag racing use, the ACT 600290 offers a noticeable performance advantage over the OEM flywheel while maintaining strong build quality. Because it is serviceable and can be resurfaced without the need for additional parts, this flywheel is a popular upgrade for Miata enthusiasts looking to maximize throttle response and engine feel on manual transmission models across the 1990-2005 year range.