{"product_id":"prc-aftermarket-lt1-312cc-cnc-ported-cylinder-heads","title":"PRC Aftermarket LT1 312cc CNC-Ported Cylinder Heads","description":"\u003cp\u003eFully assembled PRC aftermarket LT1 312cc CNC-ported cylinder heads for Gen 5 LT performance builds.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e312cc CNC intake runners\u003c\/li\u003e\n\u003cli\u003e58cc chambers\u003c\/li\u003e\n\u003cli\u003e2.165-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 springs with titanium retainers\u003c\/li\u003e\n\u003cli\u003eCHE bronze guides\u003c\/li\u003e\n\u003cli\u003eSix-bolt casting compatible with standard GM four-bolt and aftermarket six-bolt LT blocks\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e Gen 5 LT1, L86, and compatible L87-based performance applications. Verify combustion-chamber requirements, direct-injection hardware, piston-to-valve clearance, pushrod length, and intake compatibility before installation.\u003c\/p\u003e","brand":"Precision Race Components","offers":[{"title":"Default","offer_id":54635440701759,"sku":"PRC-SSLT1","price":3083.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0760\/2041\/6831\/files\/PRC-SSLT1_8c725873-fd15-41cb-a977-6203639b6b22.png?v=1785151333","url":"https:\/\/smgspeed.com\/products\/prc-aftermarket-lt1-312cc-cnc-ported-cylinder-heads","provider":"SMGspeed","version":"1.0","type":"link"}