{"product_id":"prc-260cc-ls3-cnc-ported-cylinder-heads","title":"PRC 260cc LS3 CNC-Ported Cylinder Heads","description":"\u003cp\u003eFully assembled PRC 260cc CNC-ported rectangle-port cylinder heads for LS3-family engines.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e260cc CNC intake runners\u003c\/li\u003e\n\u003cli\u003e68cc combustion chambers\u003c\/li\u003e\n\u003cli\u003e13-degree valve angle\u003c\/li\u003e\n\u003cli\u003e2.185-inch hollow-stem stainless intake valves\u003c\/li\u003e\n\u003cli\u003e1.600-inch stainless exhaust valves\u003c\/li\u003e\n\u003cli\u003eTSP .660-inch PAC dual spring package with titanium retainers\u003c\/li\u003e\n\u003cli\u003eCHE bronze guides\u003c\/li\u003e\n\u003cli\u003eIntegrated rocker pedestals\u003c\/li\u003e\n\u003cli\u003eSix-bolt casting compatible with standard four-bolt blocks\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e LS3, L92, L99, LSA, and related Gen 4 rectangle-port LS engines. Verify bore size, compression, piston-to-valve clearance, pushrod length, and intake-manifold compatibility before installation.\u003c\/p\u003e","brand":"Precision Race Components","offers":[{"title":"Default","offer_id":54635364548927,"sku":"PRC-SS260LS3","price":3099.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0760\/2041\/6831\/files\/PRC-SS260LS3_4e82bb1b-0478-4a1b-807a-9b6117d3200b.png?v=1785151263","url":"https:\/\/smgspeed.com\/products\/prc-260cc-ls3-cnc-ported-cylinder-heads","provider":"SMGspeed","version":"1.0","type":"link"}