Clutch Masters FX300 Sprung Clutch Kit w/ Steel Flywheel Honda Civic Si 2012-2015 | 08320-HRTZ-SK

Product Fitment:

2012-2015 Honda Civic SI 

Upgrade your drivetrain with the Clutch Masters FX300 Clutch Kit, engineered for 2012–2015 Honda Civic Si and other K-series platforms. This Stage 3 clutch system is built for enthusiasts who demand increased holding power, durability, and street-friendly drivability—making it ideal for bolt-on builds, aggressive NA setups, and moderate forced induction applications.

Product Overview (SEO Optimized)

The FX300 system combines a Power Plus high-rev pressure plate with a segmented Kevlar friction disc, delivering up to ~110% increased holding capacity over stock while maintaining smooth engagement and long service life.

Unlike lightweight race kits, this version includes a full-weight steel flywheel, allowing it to work with the factory ECU without requiring tuning—a major advantage for street-driven cars.

Key Features & Benefits

• Stage 3 performance clutch (FX300 series)
• Segmented Kevlar disc for long life and strong grip
• High-rev pressure plate for increased clamping force
• Includes OEM-weight steel flywheel (no tuning required)
• ~110% increased holding capacity over stock
• Smooth engagement with slightly increased pedal effort
• Designed for street performance and weekend racing

What’s Included

• High-performance pressure plate
• Sprung hub segmented Kevlar clutch disc
• Steel flywheel
• Release bearing
• Alignment tool

Performance Use Case

This clutch is best suited for:

• Bolt-on modified Civic Si builds (intake, exhaust, cams)
• Naturally aspirated performance setups
• Moderate turbo or supercharger applications
• Up to ~100hp nitrous setups

Driving Characteristics

• Pedal Feel: Slightly firmer than OEM
• Engagement: Smooth with strong bite
• Noise: Minimal (street-friendly)
• Longevity: Extended due to Kevlar material

Installation Notes

• 500-mile break-in period recommended for optimal performance
• Professional installation recommended
• Ideal to replace rear main seal and inspect hydraulics during install

Why Choose the FX300?

The FX300 hits a sweet spot between daily drivability and serious performance capability. It offers significantly more holding power than stock while avoiding the harsh engagement and noise of more aggressive puck-style clutches.

If you’re building a street-focused performance Civic Si, this is one of the most balanced and proven clutch upgrades available.