{"product_id":"stainless-steel-folded-stopper-layer-gasket","title":"Stainless Steel Folded Stopper Layer Gasket","description":"The Cosworth High Performance Head Gasket is engineered for the 2008-2016 Subaru Impreza WRX STI with the EJ257 (2.5L) engine, delivering maximum sealing performance under extreme conditions. Its construction features individual die-cut layers of stainless steel for superior consistency over laser-cut alternatives. The gasket is pre-coated with a 0.25 micron layer of nitrile rubber, ensuring uniform coating distribution and preventing high or low spots.\n\nKey features include a manufacturing dimensional tolerance of +\/- 0.001 inches and a die-cut manufacturing process that results in smooth edges. A \"folded stopper\" layer provides additional clamping force around each cylinder, and the specific sealing area width is tailored for optimal performance. This gasket has a bore of 101mm and a thickness of 0.78mm. Subaru gaskets are sold individually; two are required for a complete set.\n\nThis head gasket can also fit 2004-2007 STI models if the specific '04-'07 gasket is unavailable, offering Cosworth's renowned performance and reliability derived from decades of racing and aftermarket expertise.","brand":"Cosworth","offers":[{"title":"Default Title","offer_id":52687472755000,"sku":"20010706","price":96.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/660686957.jpg?v=1784884556","url":"https:\/\/store.motormia.co\/products\/stainless-steel-folded-stopper-layer-gasket","provider":"MOTORMIA","version":"1.0","type":"link"}