Competition Clutch Steel Flywheel Ultra Lightweight 4140 Forged Steel STU

Competition Clutch Steel Flywheel — Ultra Lightweight 4140 Forged Steel (STU) Engineered for racers and high-performance builds , the Competition Clutch Ultra Lightweight Steel Flywheel (STU) delivers faster engine response and rugged durability for forced-induction, track, and rally applications. Key Features 4140 forged steel construction — one-piece design for maximum strength and consistent performance under extreme conditions. Ultra-lightweight machining — material removed to reduce rotational mass, promoting quicker revs and sharper throttle response. Optimized for high torque — recommended for forced induction and Stage 3+ clutch setups where reliability under load matters. Application-specific weights — available in application-dependent weights ranging approximately from 8 lbs to 18 lbs to match vehicle and clutch requirements. Track & rally ready — built to withstand repeated high-RPM use and aggressive driving conditions. Why Choose the STU Flywheel The STU version is tailored for drivers seeking the best balance between lightweight rotational inertia and steel’s proven durability. Unlike multi-piece designs, the single-piece 4140 forging reduces potential failure points while maintaining clutch engagement characteristics suited to performance clutches. Notes Not all vehicle applications offer both ST and STU variants — check compatibility before ordering. Recommended for Stage 3 and higher clutch systems and forced-induction engines.