{"product_id":"competition-clutch-2004-2011-subaru-sti-15lb-steel-flywheel-2-721-st","title":"Competition Clutch 2004-2011 Subaru STI 15lb Steel Flywheel - 2-721-ST","description":"\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eCompetition Clutch Lightweight Steel Flywheel — Subaru STI 6-Speed, 15 lb (2-721-ST)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eA one-piece 4140 forged steel flywheel at 15 lbs, stamped at 2000 tons and 1260 degrees, then CNC machined and balanced to OE specification.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eOne-piece construction is the durability argument.\u003c\/strong\u003e A two-piece flywheel has a pressed or welded ring gear that can separate, and a bolted friction surface that can warp. This is one forging, so neither failure mode exists. It can also be resurfaced when the clutch comes out.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eThe ST spec is the street spec.\u003c\/strong\u003e It sheds meaningful rotating mass from the crank — faster revs and noticeably improved engine response — while retaining enough inertia to preserve low-end torque and drivability. A car with this flywheel still pulls away from a stop normally, which matters on a heavy AWD chassis.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eRecommended for naturally aspirated and street-driven applications, and well suited to Gravity, Stage 1, and Stage 2 clutch kits. Works with all performance and stock clutch assemblies.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eMeets and exceeds SFI 1.5.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 04-21 Subaru WRX STI, 6-speed. Also fits 6-speed swapped WRX chassis.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eIf the build is heavily boosted or track-focused,\u003c\/strong\u003e the ultralight STU version is machined with less material for quicker revving, suited to Stage 3 and up.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eSold individually. Flywheel bolts not included — worth replacing while it's apart.\u003c\/p\u003e","brand":"Street Strip Supply","offers":[{"title":"Default Title","offer_id":47278336704685,"sku":null,"price":395.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/8105\/7197\/files\/comp2-721-ST.jpg?v=1787178385","url":"https:\/\/streetstripsupply.com\/products\/competition-clutch-2004-2011-subaru-sti-15lb-steel-flywheel-2-721-st","provider":"Street Strip Supply","version":"1.0","type":"link"}