Action Clutch AC126FW Chromoly Flywheel for 16-21 Honda Civic Si 1.5L

Vehicle Fitment

• 2016-2021 Honda Civic (Si, EX, 1.5T L15B7 Turbo, Manual)
• 2017-2022 Honda Civic (EX, 1.5T, Manual)
• 2018-2020 Honda Accord (LX, EX, EX-L, Sport, Touring, 1.5T, Manual)
• 2023 Honda Civic (Si, 1.5T, Manual)
• 2023 Acura Integra (Base, A-Spec, 1.5T, Manual)
• Fitment confirmed through 2024. 2025 coverage unconfirmed at time of listing.

Features

• Chromoly billet steel construction for high durability
• 40-60% lighter than stock flywheel for improved acceleration
• Reduces rotational inertia for faster throttle response
• Heat-treated for improved strength and thermal resistance
• Engineered to withstand high RPM use (up to 15,000-18,000 RPM)
• Resurfacing capable for extended service life
• Improves engine rev-matching and shifting performance
• Balanced for optimal drivetrain performance and reduced vibration
• Designed for street, drag, drift, and performance driving

Specifications

• Material: One-piece billet chromoly steel
• Type: Lightweight performance flywheel
• Approximate Weight Reduction: 40-60% vs OEM
• Engine Compatibility: 1.5L Turbo (L15B7)
• Transmission: Manual only
• RPM Rating: Tested up to 15,000-18,000 RPM
• Design: Heat-treated with stepped dowel configuration
• Function: Improves clutch engagement and engine response

Included Components

• 1x Chromoly Lightweight Flywheel

Product Description

The Action Clutch AC126FW Chromoly Lightweight Flywheel is a high-performance drivetrain upgrade designed to improve throttle response and overall engine efficiency. By significantly reducing rotational mass compared to the factory flywheel, this component allows your engine to rev faster, shift quicker, and deliver more immediate power delivery. It is especially beneficial for performance-oriented builds, including street, drag, autocross, and track applications.

Constructed from high-strength chromoly steel and heat-treated for durability, this flywheel is engineered to withstand extreme conditions and high RPM use. The lightweight design reduces inertia by up to 60%, which enhances acceleration but may introduce slight gear rattle or NVH (noise, vibration, harshness), a common characteristic of performance flywheels. This is a trade-off for improved responsiveness and performance.

This flywheel is compatible with multiple 1.5L turbocharged Honda and Acura platforms equipped with manual transmissions. It is commonly used as a required pairing component with Action Clutch performance clutch kits. Installation should be performed by a qualified technician to ensure proper fitment, balance, and long-term reliability.