{"product_id":"performance-clutches-bmw-e46-m3-stage-4-sport-smf-clutch-kit","title":"Performance Clutches BMW E46 M3 Stage 4 Sport SMF Clutch Kit","description":"\u003cp\u003eThe Performance Clutches Stage 4 Sport Single Mass Flywheel Kit is designed for BMW E46 M3 owners looking for maximum drivetrain response, reduced rotational mass, and competition-focused clutch performance. Developed for demanding applications such as drifting, circuit racing, and time attack, this setup prioritises rapid engine response and direct torque transfer over everyday refinement.\u003c\/p\u003e\r\n\r\n\u003cp\u003eAt the centre of the kit is a 7.2kg lightweight single mass flywheel, manufactured from 4140 forged steel with an integral ring gear. The reduced rotational mass significantly lowers engine inertia compared with the factory dual-mass flywheel, allowing the engine to rev more quickly and providing sharper throttle response and faster gear changes.\u003c\/p\u003e\r\n\r\n\u003cp\u003eThe clutch assembly features a QT450 steel pressure plate, providing high clamp load and excellent thermal stability during sustained high-temperature use. This is paired with a rigid ceramic 6-paddle friction disc, which removes the sprung hub and marcel cushioning found in more road-focused clutch designs. The result is a more immediate engagement, reduced clutch assembly inertia, and highly effective torque transfer under extreme conditions.\u003c\/p\u003e\r\n\r\n\u003cp\u003eThe rigid ceramic paddle design provides excellent resistance to heat and clutch slip, making it well suited to aggressive launches, clutch kicks, high-RPM driving, and heavily modified engines. Its direct engagement characteristics are deliberately focused on competition use rather than refinement.\u003c\/p\u003e","brand":"Performance Clutches","offers":[{"title":"Default Title","offer_id":57406018978167,"sku":"PC-3154-S4PF","price":859.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/0703\/4172\/files\/PC-3154-S4PF_webp.webp?v=1787588036","url":"https:\/\/mattlewisracing.co.uk\/products\/performance-clutches-bmw-e46-m3-stage-4-sport-smf-clutch-kit","provider":"Matt Lewis Racing","version":"1.0","type":"link"}