{"product_id":"porsche-willhoit-stock-cylinder-head-set-356-912-50-69-smc-005-024","title":"Porsche Willhoit Stock Cylinder Head Set - 356\/912 50-69  SMC-005-024","description":"Porsche Willhoit stock cylinder head set for 356 (1950-1965) and 912 (1965-1969) models. Cast just like the original heads but using a proprietary alloy and heat treat process that will not crack. The prototypes were extensively tested on the WR engine dyno and on the street. The flow-through finning allows for cooling that is impossible with a CNC machined head. \u003cbr\u003e\u003cbr\u003e The smaller DR6EA plug is 12mm x  ¾â€","brand":"Willhoit Auto Restoration","offers":[{"title":"Default Title","offer_id":39801484935226,"sku":"SMC.005.024","price":4858.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0549\/4846\/2650\/products\/Porsche-Willhoit-Stock-Cylinder-Head-Set-356-912-5.png?v=1747850898","url":"https:\/\/sierramadrecollection.com\/products\/porsche-willhoit-stock-cylinder-head-set-356-912-50-69-smc-005-024","provider":"Sierra Madre Collection","version":"1.0","type":"link"}