{"product_id":"prc-247cc-cnc-ported-cathedral-port-cylinder-heads","title":"PRC 247cc CNC-Ported Cathedral-Port Cylinder Heads","description":"\u003cp\u003eFully assembled PRC 247cc CNC-ported cathedral-port cylinder heads for large-cubic-inch LS combinations.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e247cc CNC intake runners\u003c\/li\u003e\n\u003cli\u003e84cc CNC exhaust runners\u003c\/li\u003e\n\u003cli\u003e68cc chambers\u003c\/li\u003e\n\u003cli\u003e2.120-inch hollow-stem intake valves\u003c\/li\u003e\n\u003cli\u003e1.600-inch stainless exhaust valves\u003c\/li\u003e\n\u003cli\u003eTSP .660-inch PAC dual springs with titanium retainers\u003c\/li\u003e\n\u003cli\u003eCHE bronze guides\u003c\/li\u003e\n\u003cli\u003eFactory rocker compatible\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e Cathedral-port LS engines with a 4.03-inch or larger bore, typically 408 cubic inches and larger.\u003c\/p\u003e\u003cp\u003eVerify compression, piston-to-valve clearance, pushrod length, and intake-port compatibility before installation.\u003c\/p\u003e","brand":"Precision Race Components","offers":[{"title":"Default","offer_id":54635331256639,"sku":"PRC-SS247CNC","price":3099.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/smgspeed.com\/products\/prc-247cc-cnc-ported-cathedral-port-cylinder-heads","provider":"SMGspeed","version":"1.0","type":"link"}