{"product_id":"mk4-focus-st-clutch-flywheel-upgrade-kit-genuine-ford-rs-clutch-slave-flywheel","title":"MK4 Focus ST Clutch \u0026 Flywheel Upgrade Kit — Genuine Ford RS Clutch, Slave \u0026 Flywheel","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eMK4 Focus ST — Complete Clutch \u0026amp; Flywheel Upgrade Kit\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe stock clutch on the MK4 Focus ST is a known weak point on tuned cars. Even at Stage 1, the increased torque from the 2.3 EcoBoost can overwhelm the factory clutch — causing slip under hard acceleration, particularly in higher gears at full boost. It's the most commonly reported issue on tuned MK4 STs, and it gets worse as the clutch wears.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThis complete kit gives you everything you need in one box — no sourcing individual parts, no compatibility guesswork.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWhat's in the kit:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eGenuine Ford MK3 Focus RS clutch plate \u0026amp; pressure plate — rated for 345bhp \/ 441Nm from the factory, comfortably handling Stage 1 and Stage 2 torque levels\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eGenuine Ford MK3 Focus RS slave cylinder — metal construction, replacing the ST's weaker plastic unit\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eGenuine Ford MK4 Focus ST dual mass flywheel \u0026amp; bolts — brand new replacement for your existing flywheel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe RS clutch has a higher clamp force than the standard ST unit, meaning it handles the increased torque from a remap without slipping — while retaining smooth, OEM-like pedal feel. No aggressive bite, no on\/off engagement, no compromises for daily driving. The metal RS slave cylinder is more robust than the plastic ST unit and should always be replaced at the same time as the clutch.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eWe include a new flywheel because if you're already paying for the labour to drop the gearbox, fitting a fresh flywheel at the same time is a no-brainer. Also if the previous clutch has slipped even slightly, it will have glazed the surface of the flywheel and the replacement clutch won't bed into it properly.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eA worn dual mass flywheel causes judder, vibration and rough engagement — starting fresh ensures everything works as it should.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e MK4 \/ MK4.5 Focus ST 2.3 EcoBoost (manual gearbox)\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWhen to upgrade:\u003c\/strong\u003e\u003cbr\u003eWe strongly recommend fitting this kit at Stage 1 and above. If you're already experiencing slip — loss of drive under full boost, a burning smell after hard driving, or judder when pulling away — the stock clutch is done and this is the solution.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eEven if your clutch feels fine right now, fitting the upgrade at the same time as your remap saves you the labour cost of doing it later when it inevitably slips.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e📖 \u003ca href=\"https:\/\/wayside-performance.co.uk\/pages\/mk4-focus-st-tuning-guide-stage-1-stage-1-stage-2\" target=\"_blank\" rel=\"noopener\"\u003eRead our full MK4 Focus ST Tuning Guide →\u003c\/a\u003e\u003c\/p\u003e","brand":"Wayside Performance ","offers":[{"title":"Default Title","offer_id":51506023432498,"sku":null,"price":999.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1509\/8328\/files\/image_8a865c30-016d-47d0-be62-a175aede5401.jpg?v=1784910293","url":"https:\/\/wayside-performance.co.uk\/products\/mk4-focus-st-clutch-flywheel-upgrade-kit-genuine-ford-rs-clutch-slave-flywheel","provider":"Wayside Performance ","version":"1.0","type":"link"}