{"product_id":"amc-head-50-by-40-valves-dual-high-rev-stage-2-p-p-set-of-2","title":"Set of AMC Head 50 by 40 Valves, Dual High-Rev, Stage 2 P\u0026P","description":"\u003cp\u003e\u003cstrong\u003eThis is a brand new (Set of 2) Stage 2 Port and Polished High Performance Cylinder Heads for a Porsche 9142.0L or Type 4 Bus\/ Porsche 1.8L On the Porsche 2.0LThe Stock Spark plug holes will be welded up and relocated to the 914 2.0L position for that application.A 4 stud intake manifold will be required. Heads comes with stainless steel 50mm intake and a stainless steel 40mm exhaust valves, with harden keepers, chromoly retainers, and dual high rev springs.They areready to install.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMade from an AMC 1.8L type4 casting with breather using 8mm valvestems .\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe heads can also be opened to 103 to accommodate the larger bore sizes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eEngine: \u003c\/strong\u003ePorsche 914 2.0L \/ Type 4, BusPorsche1.8L\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSprings: \u003c\/strong\u003eDual High Rev\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValves: \u003c\/strong\u003e50mm Intake by 40mm Exhaust\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCasting: \u003c\/strong\u003eAMC 1.8L\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size:\u003c\/strong\u003e14mm (Replacement Bosch Number is W8CCor NGKis B5ES.)\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eBore: \u003c\/strong\u003e103works with103, 104, \u0026amp; 105mm Kits\u003c\/p\u003e\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Pick Bore size, and Spring Upgrade when ordering Above\u003c\/strong\u003e\u003c\/p\u003e","brand":"AMC","offers":[{"title":"103-105 Stage 2","offer_id":46603668717758,"sku":"022 470 103B P2-AMC X2","price":3887.9,"currency_code":"USD","in_stock":true},{"title":"914 Plug Location 103-105 Stage 2","offer_id":46603668750526,"sku":"039 470 103B P2-AMC X2","price":3653.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/6323\/0398\/files\/022-455-XXX-P1_2a47159e-a65a-4c97-9962-6850df6772d7.jpg?v=1776113097","url":"https:\/\/gex-international.myshopify.com\/products\/amc-head-50-by-40-valves-dual-high-rev-stage-2-p-p-set-of-2","provider":"GEX_AA Performance","version":"1.0","type":"link"}