Enhanced strength with sharper drivetrain response. The Performance Clutches Stage 1 Street HD Single Mass Flywheel Kit is engineered for Ford Focus ST and RS drivers seeking increased torque capacity, durability, and the performance advantages of a lightweight solid flywheel conversion.

The kit centers around a 9.2kg lightweight single mass flywheel, manufactured from 4140 forged steel with an integral ring gear. This forged construction provides exceptional mechanical strength and heat resistance while significantly reducing rotational mass. By lowering the engine’s moment of inertia, revs build and fall more rapidly — resulting in sharper throttle response and quicker, more precise gear changes.

The cover assembly incorporates a QT450 steel pressure plate, selected for its superior thermic stability and resistance to distortion during sustained high-temperature operation.

Why this clutch kit stands out

• Heavy-Duty Street Upgrade – Increased clamping load over OE for improved torque capacity in tuned road applications.
• 9.2kg 4140 Forged Steel Flywheel – Reduced inertia enhances engine acceleration and shift response.
• Integral Ring Gear Construction – One-piece design for maximum durability.
• QT450 Steel Pressure Plate – Exceptional thermal capability for consistent clamp load.
• Steel-Backed Organic Friction Disc – Progressive engagement with excellent heat resistance and service life.

Ideal for you if you:

• Are converting your Ford Focus ST or RS to a lightweight SMF system.
• Require increased torque capacity with refined street drivability.
• Want sharper engine response and a more connected feel.
• Drive primarily on the road with regular spirited use.