{"product_id":"precision-race-components-aftermarket-lt4-cnc-cylinder-heads-prr-199-prclt4","title":"Precision Race Components Aftermarket LT4 CNC Cylinder Heads - 199-PRCSSLT4","description":"Precision Race Components Aftermarket LT4 CNC Cylinder Heads - PRR-199-SSPRCLT4\u003cbr\u003e\u003cbr\u003ePrecision Race Components LT4 CNC 312cc ported cylinder heads.  All new 6-bolt Precision Race Components LT cylinder heads!\u003cbr\u003eMADE in the USA!! CAST in the USA!! MACHINED in the USA!!\u003cbr\u003eNow available For LT1 or LT4 Builds!\u003cbr\u003e2.165\" Titanium Intake Valves\u003cbr\u003e1.600\" Hollow Stem Stainless Steel Exhaust Valves\u003cbr\u003ePRC Dual Spring Kits featuring PAC .660\" or .750\" lift springs are available. Includes new seats, seals and titanium retainers.\u003cbr\u003e6-Bolt Cylinder Heads with Thicker Deck Surface\u003cbr\u003eCHE Bronze Guides\u003cbr\u003eWill Work on Both Standard GM 4-Bolt \u0026amp;  Aftermarket LT 6-Bolt Style Engine Blocks\u003cbr\u003eCompletely Assembled \u0026amp; Setup To Your Specs\u003cbr\u003eExtensive CNC and dyno testing has resulted in one of the most powerful LT-based cylinder heads available! \u003cbr\u003eThe PRC LT cylinder heads are available with hollow-stem  or titanium intake valves. The hollow-stem intake valves shed significant intake valve weight and allow for additional lift. The titanium intake valves will be the lightest choice however and offer the best durability possible!\u003cbr\u003eCylinder Head Specs:\u003cbr\u003eIntake CC:    312cc\u003cbr\u003eIntake Valve: 2.165\"\u003cbr\u003eExhaust Valve:1.600\"\u003cbr\u003eChamber Size: 62.5cc\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eLethal Performance is proud to offer the entire line of  products!\u003cbr\u003e","brand":"Texas Speed","offers":[{"title":"Default Title","offer_id":48142362738946,"sku":"TSP-199-PRCSSLT4","price":3656.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0618\/0354\/files\/9210.png?v=1784989121","url":"https:\/\/www.lethalperformance.com\/products\/precision-race-components-aftermarket-lt4-cnc-cylinder-heads-prr-199-prclt4","provider":"Lethal Performance","version":"1.0","type":"link"}