{"product_id":"grimmspeed-head-gasket-set-1-1mm-for-subaru-08-21-sti-ej25b-davcs","title":"GrimmSpeed Head Gasket Set 1.1mm For Subaru 08-21 STI EJ25B DAVCS","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eSeal the deal with a set of GrimmSpeed EJ25 Head Gaskets! GrimmSpeed has set the standard for quality when it comes to aftermarket replacement gaskets so it's only natural that we should offer our fans the \u003cstrong\u003eMost important gaskets their car will ever need:\u003c\/strong\u003e Introducing The GrimmSpeed EJ25 Head Gasket Sets!\u003c\/p\u003e\n\u003cp\u003eFeature-packed, these gaskets are a perfect fit for any engine build, from basic refresh to a high horsepower track monster. The GrimmSpeed Head Gaskets feature a multi-layer steel (MLS) construction, in which multiple grades are used to provide optimal surface and combustion chamber sealing as they are torqued down.\u003c\/p\u003e\n\u003cp\u003eThe top and bottom Layers feature a Nitrile Rubberized Coating that helps accommodate a rougher RA surface finish of up to 50microinch. This acts to better Seal the non-critical areas of the gasket. In addition, the gasket edge includes a folded stopper layer that allows for optimal sealing for the combustion chamber.\u003c\/p\u003e\n\u003cp\u003eThis is done to help reduce the chances of combustion gasses causing head gasket failures under extremely high cylinder pressures that built engines can experience.\u003c\/p\u003e\n\u003cp\u003eAfter talking to numerous engine builders\/tuners it was clear that creating a variety of gasket thicknesses was key for pairing them with the right build.\u003c\/p\u003e\n\u003cp\u003eWith that in mind, we've made the gaskets available in multiple thicknesses (. 78, 1. 1, 1. 5mm) to help fine tune each individual build. In addition, the slightly oversized bore diameters will allow for up to 0.5mm overbore. The EJ specific gaskets include enlarged center head bolt holes to accommodate up to a 13mm head studs.\u003c\/p\u003e\n\u003cp\u003eThis is a popular upgrade option for many higher power builds, where additional cylinder head clamping force is needed. We've outdone ourselves this time, The GrimmSpeed Head Gaskets carry on the legacy of quality that you've come to know from our other extremely popular gaskets.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQuick Specs\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSold as a Set\/Pair\u003c\/li\u003e\n\u003cli\u003eSingle and Dual AVCS Fitment\u003c\/li\u003e\n\u003cli\u003eDie Cut Multi-Layer Stainless Steel (MLS) Construction Provides smooth edge finish and consistency from batch to batch, +\/-0. 001 manufacturing tolerance\u003c\/li\u003e\n\u003cli\u003eFolded Stopper Layer to Better Seal the Combustion Chamber\u003c\/li\u003e\n\u003cli\u003e. 25micron Nitrile Rubber Layer Coating reduces chances of leaking on imperfectly smooth mating surfaces Over non-coated gasket.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAccommodates up to 100. 0mm bore Compatible with up to 13mm studs 0. 78mm, 1. 1mm and 1. 5mm thickness (after crushing) Testing GrimmSpeed High Performance Head Gaskets are Designed to optimize combustion chamber sealing.\u003c\/p\u003e\n\u003cp\u003eThis is done by using a unique gasket Design feature which sets us apart from the competition. By strategically undercutting the middle layer of the gasket near the combustion chamber, we can control the crushing of outer Layers, which in turn creates a perfect Seal around the combustion chamber.\u003c\/p\u003e\n\u003cp\u003eWe can visually demonstrate this feature by using pressure sensitive film and compressing the gasket in a manner which mimics the tightening of a head against the block. The film changes colors from white to pink to Red as pressure is applied to deNote areas of high and low pressure application.\u003c\/p\u003e\n\u003cp\u003eThis information will then allow for easy visual verification of effectiveness in sealing of a gasket against a surface. As seen in the results, the combustion chambers are sealed evenly and equally around the circumference of the cylinder by the deep part circles.\u003c\/p\u003e\n\u003cp\u003eThis visual representation is showing that combustion gasses are going to be held in the chamber and directed towards pushing the piston instead of escaping. Failure of a gasket to Seal with even pressure around the circumference of the cylinder would be detrimental for performance and reliability of a gasket and would Most certainly result in failure.\u003c\/p\u003e\n\u003cp\u003eWhen combining the perfect sealing, nitrile coating and other features of the gaskets, we are able to ensure that your engine build is ready for anything that you throw at it. From basic engine refreshes to full blown race builds, The Mark of Innovation from GrimmSpeed keeps you in control under pressure!\u003c\/p\u003e\n\u003cp\u003eFitment 04-07 STI EJ25 SAVCS 06-14 WRX EJ25 SAVCS 04-08 FXTВ EJ25 SAVCS 05-09 LGTВ EJ25 SAVCS 08-21 STI EJ25DAVCS\u003c\/p\u003e\n\u003ch2\u003eAdditional Description\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLimited Lifetime\u003c\/li\u003e\n\u003cli\u003eCALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov\u003c\/li\u003e\n\u003cli\u003e1.1mm\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GrimmSpeed","offers":[{"title":"Default Title","offer_id":44831374901446,"sku":"GRM124004","price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0081\/0804\/8420\/files\/124004-JBCB_baa39576-4996-4854-9625-b2dc86749c92.jpg?v=1755871498","url":"https:\/\/www.graveyardperformance.com\/products\/grimmspeed-head-gasket-set-1-1mm-for-subaru-08-21-sti-ej25b-davcs","provider":"Graveyard Performance","version":"1.0","type":"link"}