{"product_id":"cometic-mazda-miata-1-6l-80mm-040-inch-mls-head-gasket-b6d-motor","title":"Cometic MLS Head Gasket 80mm Bore .040in - NA6 Miata (90-93)","description":"\u003cp\u003eThe Cometic C4122-040 is a multi-layer steel (MLS) cylinder head gasket for the Mazda 1.6L B6 engine (Cometic lists B6D\/B6T\/B6ZE) with an 80 mm bore opening and a compressed thickness of .040 in. Cometic lists it for the 1990-1993 Mazda Miata (NA, 1.6L B6ZE). Gasket thickness is one of the variables used to set compression ratio and piston-to-head clearance in a built engine.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e80 mm bore opening, the only bore size Cometic lists for the B6 (the B6's stock bore is 78 mm)\u003c\/li\u003e\n\u003cli\u003eCompressed thickness .040 in; Cometic does not publish a compression ratio for this gasket, so calculate it for your build\u003c\/li\u003e\n\u003cli\u003e3-layer MLS (multi-layer stainless steel) construction\u003c\/li\u003e\n\u003cli\u003eOuter stainless steel layers carry a .001 in Viton rubber coating; installed dry, without additional sealant (Cometic says extra sealer can hinder sealing)\u003c\/li\u003e\n\u003cli\u003eRequires smooth, flat and true head and block deck surfaces; Cometic recommends a surface finish of 50 Ra or finer\u003c\/li\u003e\n\u003cli\u003eMade to order by Cometic; use the head bolt (fastener) manufacturer's torque values\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 1990-1993 Mazda Miata (NA6, 1.6L B6ZE). Not for the 1994-2005 1.8L BP engine: Cometic sells separate BP gaskets for those cars.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePart number:\u003c\/strong\u003e Cometic C4122-040\u003c\/p\u003e\u003cp\u003eThis Part Fits:\u003c\/p\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003cth align=\"left\" width=\"100\"\u003eYear\u003c\/th\u003e\n\u003cth align=\"left\" width=\"125\"\u003eMake\u003c\/th\u003e\n\u003cth align=\"left\" width=\"150\"\u003eModel\u003c\/th\u003e\n\u003cth align=\"left\" width=\"80\"\u003eSubmodel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1990-1993\u003c\/td\u003e\n\u003ctd\u003eMazda\u003c\/td\u003e\n\u003ctd\u003eMiata\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Cometic Gasket","offers":[{"title":"Default Title","offer_id":45966007533793,"sku":"CGSC4122-040","price":108.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0620\/6849\/0465\/files\/276d99b7e4afd7efd22bdba44a15b7c6_65f21bc8-8214-4b05-876c-26c29e75c6da.jpg?v=1733316940","url":"https:\/\/www.garage-56.com\/products\/cometic-mazda-miata-1-6l-80mm-040-inch-mls-head-gasket-b6d-motor","provider":"Garage 56 Engineering ","version":"1.0","type":"link"}