{"product_id":"cometic-88mm-k-series-mls-head-gasket-c4312","title":"Cometic 88mm K-Series MLS Head Gasket C4312 - .040 to .060","description":"\u003cul\u003e\n\u003cli\u003e88mm bore, 3-layer MLS construction \u003c\/li\u003e\n\u003cli\u003e.040 in, .045 in, .051 in, .060 in \u003c\/li\u003e\n\u003cli\u003eViton-coating withstands 250°C \u003c\/li\u003e\n\u003cli\u003eFits K24 bored, K20 sleeved to 88mm \u003c\/li\u003e\n\u003cli\u003eRequires block and head finish of 50 RA or smoother \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#InstallGuide\"\u003eInstall Guide\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eCometic 88mm K-Series MLS Head Gasket - Part #C4312-040 \/ -045 \/ -051 \/ -060\u003c\/h3\u003e\n\u003cp\u003eOnce a K24 goes to 88mm, or a K20 gets sleeves, the stock-bore gaskets are done. Cometic's C4312 is the 88mm 3-layer MLS, and it's sold here in four thicknesses from .040 to .060 because an 88mm build is almost always a compression-ratio conversation as well.\u003c\/p\u003e\n\u003ch3\u003eWhat It Is and Why It Works\u003c\/h3\u003e\n\u003cp\u003eCometic's MLS gasket is three layers of stainless steel: two embossed outer layers coated in a Viton fluoroelastomer that seals against the block and head, and a center shim that sets the compressed thickness. The Viton handles 250 C, the stainless springs back after every heat cycle instead of taking a set, and the layered design tolerates the slight movement between an aluminum head and block that kills a composite gasket. It's the same construction Honda uses from the factory, done with more clamp margin.\u003c\/p\u003e\n\u003cp\u003eThickness is how you set compression and piston-to-valve clearance after a deck cut or a piston change. Thicker gasket, lower static compression, more clearance; thinner, the reverse. Cometic sells the same gasket in several thicknesses for that reason, and the bore has to clear your actual cylinder bore, not the one the engine left the factory with.\u003c\/p\u003e\n\u003ch3\u003eSpecs\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eC4312-040, C4312-045, C4312-051, C4312-060\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMLS, 3-layer stainless with Viton coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e88mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompressed thickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.040 in, .045 in, .051 in, .060 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngines\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eK24 bored to 88mm; K20 sleeved or bored to 88mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 head gasket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVehicle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2002-2006 Acura RSX Base, Type-S\u003c\/td\u003e\n\u003ctd\u003eK20A3, K20A2, K20Z1 (bored)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2002-2005 Honda Civic Si\u003c\/td\u003e\n\u003ctd\u003eK20A3 (bored)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2004-2008 Acura TSX\u003c\/td\u003e\n\u003ctd\u003eK24A2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2003-2007 Honda Accord 2.4\u003c\/td\u003e\n\u003ctd\u003eK24A4, K24A8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2002-2009 Honda CR-V\u003c\/td\u003e\n\u003ctd\u003eK24A1, K24Z1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2003-2011 Honda Element\u003c\/td\u003e\n\u003ctd\u003eK24A4, K24A8, K24Z1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eK-swaps\u003c\/td\u003e\n\u003ctd\u003eK24 or K20 bored to 88mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e88mm is an overbore on every K-series. This gasket is for a K24 taken out a millimeter or a sleeved K20; it does not seal on a stock 86 or 87mm bore.\u003c\/p\u003e\n\u003ch3\u003eWhat to Know Before You Buy\u003c\/h3\u003e\n\u003cp\u003eSurface finish matters more than anything else. Cometic wants the block and head decked to 50 RA or smoother; an MLS gasket on a rough or corroded deck will weep coolant no matter how it's torqued. Have the head checked for flatness and skimmed if it's been overheated.\u003c\/p\u003e\n\u003cp\u003eThe .060 is where you land when you're running a K24 block with a K20 head and want to pull static compression down for boost without changing pistons. The .040 is for a naturally aspirated 88 that only needs clearance after a deck cut. Everything in between is a piston-maker calculation.\u003c\/p\u003e\n\u003cp\u003eMeasure the bore and check the fire ring lands fully on the sleeve or cylinder wall. An 88mm gasket on an 87.5 sleeve leaves the ring hanging over the edge and it will blow out.\u003c\/p\u003e\n\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVehicle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2002-2006 Acura RSX Base, Type-S\u003c\/td\u003e\n\u003ctd\u003eK20A3, K20A2, K20Z1 (bored)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2002-2005 Honda Civic Si\u003c\/td\u003e\n\u003ctd\u003eK20A3 (bored)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2004-2008 Acura TSX\u003c\/td\u003e\n\u003ctd\u003eK24A2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2003-2007 Honda Accord 2.4\u003c\/td\u003e\n\u003ctd\u003eK24A4, K24A8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2002-2009 Honda CR-V\u003c\/td\u003e\n\u003ctd\u003eK24A1, K24Z1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2003-2011 Honda Element\u003c\/td\u003e\n\u003ctd\u003eK24A4, K24A8, K24Z1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eK-swaps\u003c\/td\u003e\n\u003ctd\u003eK24 or K20 bored to 88mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e88mm is an overbore on every K-series. This gasket is for a K24 taken out a millimeter or a sleeved K20; it does not seal on a stock 86 or 87mm bore.\u003c\/p\u003e \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eC4312-040, C4312-045, C4312-051, C4312-060\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMLS, 3-layer stainless with Viton coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e88mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompressed thickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.040 in, .045 in, .051 in, .060 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngines\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eK24 bored to 88mm; K20 sleeved or bored to 88mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 head gasket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackaged size \/ weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e17.5 x 8.3 x 0.1 in, 0.8 lb (per PIM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003cli id=\"InstallGuide\"\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n","brand":"Cometic Gasket","offers":[{"title":".040 in","offer_id":46629240209442,"sku":"COG-C4312-040","price":96.52,"currency_code":"USD","in_stock":false},{"title":".045 in","offer_id":46629240242210,"sku":"COG-C4312-045","price":96.52,"currency_code":"USD","in_stock":false},{"title":".051 in","offer_id":46629240274978,"sku":"COG-C4312-051","price":96.52,"currency_code":"USD","in_stock":false},{"title":".060 in","offer_id":46629240307746,"sku":"COG-C4312-060","price":123.78,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/g-0c909e10-2f48-49e0-bf6f-13c665037d0d-800.jpg?v=1787944905","url":"https:\/\/www.hybrid-racing.com\/products\/cometic-88mm-k-series-mls-head-gasket-c4312","provider":"Hybrid Racing","version":"1.0","type":"link"}