{"product_id":"cometic-mazda-bp-4w-turbo-bp-z3-030in-mls-cylinder-head-gasket-85mm-bore","title":"Cometic MLS Head Gasket 85mm Bore .030in - NB2 Miata (01-05)","description":"\u003cp\u003eThe Cometic C4984-030 is a multi-layer steel (MLS) cylinder head gasket with an 85 mm bore and .030 in compressed thickness for the 1.8L BP-Z3 (VVT) engine in the 2001-2005 Mazda Miata (NB2), including the turbocharged 2004-2005 Mazdaspeed. The stock BP bore is 83 mm, so the 85 mm gasket is for engines bored 2 mm oversize; match the gasket bore to the finished cylinder bore.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e85 mm round bore; .030 in compressed thickness, the thinnest gasket Cometic lists for this bore\u003c\/li\u003e\n\u003cli\u003e3-layer MLS (multi-layer stainless steel) construction\u003c\/li\u003e\n\u003cli\u003eA thinner gasket reduces combustion-chamber volume, raising compression and reducing piston-to-head clearance; Cometic does not publish a compression ratio for this gasket, so calculate it for your build\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 (2-3 week production time); use the head bolt (fastener) manufacturer's torque values\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 2001-2005 Mazda Miata (NB2, 1.8L BP-Z3 VVT), including the 2004-2005 Mazdaspeed. For an engine bored to 85 mm. Not for the 1999-2000 Miata (NB1) or 1994-1997 Miata (NA8); those heads have different coolant passages and use Cometic's BP-4W\/BP-ZE gaskets (C4560, C4568, C4569). When mixing heads and blocks, match the gasket to the head.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePart number:\u003c\/strong\u003e Cometic C4984-030\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\u003e2001-2005\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":45966035189985,"sku":"CGSC4984-030","price":108.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0620\/6849\/0465\/files\/fdeac4177627734be2b35ddbed04a126.jpg?v=1733317315","url":"https:\/\/www.garage-56.com\/products\/cometic-mazda-bp-4w-turbo-bp-z3-030in-mls-cylinder-head-gasket-85mm-bore","provider":"Garage 56 Engineering ","version":"1.0","type":"link"}