Performance Clutches Stage 1 single-mass flywheel clutch kit for Ford Focus III

The Performance Clutches Stage 1 Street HD clutch kit with a single-mass flywheel (SMF) is intended for drivers of Ford Focus ST and RS models who need greater torque-transfer capacity, durability and the benefits of converting to a lightweight single-mass flywheel.

The centrepiece of the kit is a lightweight single-mass flywheel weighing 9.2 kg, made from forged 4140 steel with an integrated ring gear. The forged design provides high mechanical strength and heat resistance while significantly reducing rotating mass. The engine’s lower moment of inertia allows the revs to rise and fall faster, resulting in sharper throttle response and quicker, more precise gear changes.

The cover assembly features a QT450 steel pressure plate, selected for its good temperature stability and resistance to deformation during prolonged operation at high temperatures.

Kit benefits

• Reinforced Heavy-Duty road design – greater clamping force than the original clutch for increased torque-transfer capacity in modified road cars.
• Forged 4140 steel flywheel, 9.2 kg – lower inertia improves engine acceleration and responsiveness during gear changes.
• Integrated ring gear – one-piece design for maximum durability.
• QT450 steel pressure plate – excellent temperature resistance for consistent clamping force.
• Organic friction disc with steel backplate – progressive engagement, good heat resistance and long service life.

The kit is primarily intended for converting a Ford Focus ST or RS to a lightweight single-mass flywheel system, increasing torque-transfer capacity while retaining everyday drivability, and achieving sharper engine response. It is suitable mainly for road use with occasional spirited driving.

Technical specifications

• Disc diameter: 240 mm
• Hub spline count: 23
• Friction material: full-face organic lining (Full Face Organic)
• Design: push type (Push Type)
• Stage: Stage 1 Street HD Kit

The kit is intended exclusively for 2.0 ST and 2.3 RS engines with codes R9DA, R9DB, R9DC, R9DD and YVDA.

Suitable for: Ford Focus III (DYB).