{"product_id":"mast-motorsports-factory-mast-4-065-bore-lt-heads-2-165-valve-size-ch-ltx-310514","title":"Mast Motorsports Factory Mast 4.065\" Bore LT Heads - 2.165\" Valve Size","description":"\u003cp\u003eThe Mast Motorsports cylinder head product line is completely manufactured from a raw casting to a finished cylinder head in the USA located in Nacogdoches Texas.\u003cbr\u003e\nMast refuses to compromise on materials and methods that may jeopardize longevity, performance, and quality.  When buying Mast Cylinder heads, you are getting the highest level of quality and performance on the market.\u003cbr\u003e\nFull Send, no compromises, no shortcuts, ever.\u003cbr\u003e\nDimensional Specs\u003cbr\u003e\nBore Size: 4.065\" (+)\u003cbr\u003e\nWeight: 30 lbs.\u003cbr\u003e\nIntake Valve Size: 2.126\" OE\/2.165\" Large Valve\u003cbr\u003e\nExhaust Valve Size: 1.590\"\u003cbr\u003e\nValve Stem Diameter: 8mm\u003cbr\u003e\nValve Length: 5.550\"\u003cbr\u003e\nIntake Valve Angle: 12.5°x2.61°\u003cbr\u003e\nExhaust Valve Angle: 12°x2.38°\u003cbr\u003e\nValve Spring Pocket Diameter: 1.325\"\u003cbr\u003e\nValve Spring Install Height: 1.880\"\u003cbr\u003e\nHead Stud Size: .472\"\u003cbr\u003e\nValve Guide OD: .500\"\u003cbr\u003e\nValve Job Type: Newen CNC 5 Angle\u003cbr\u003e\nAir Flow \u0026amp; Performance Criteria\u003cbr\u003e\nIntake Max. Flow: 350 CFM OE \/ 379 CFM Large Valve @ 0.700\"\u003cbr\u003e\nExhaust Max. Flow: 214 CFM @0.700\"\u003cbr\u003e\nIntake Average Flow: 251 CFM OE \/ 270 CFM Large Valve\u003cbr\u003e\nExhaust Average Flow: 157 CFM\u003cbr\u003e\nIntake Seat Material: OE Seat Material\/Ductile Iron (Large Valve)\u003cbr\u003e\nIntake Port Volume: 301cc\u003cbr\u003e\nExhaust Port Volume: 112cc\u003cbr\u003e\nStandard Chamber Volume: 60cc\u003cbr\u003e\nPort Type: CNC\u003cbr\u003e\nMaterials\u003cbr\u003e\nCylinder Head Material: 319-T7 Aluminum\u003cbr\u003e\nIntake Valve Seat Material: OE Seat Material\/Ductile Iron (Large Valve)\u003cbr\u003e\nExhaust Valve Seat Material: OE Seat Material\u003cbr\u003e\nDeck Thickness: .300\"\u003cbr\u003e\nRocker Stand Type: Pedestal\u003cbr\u003e\nRocker Arm Type: LS7 Exhaust 1.8 Ratio\u003cbr\u003e\nGuide Material: Powdered Metal\u003cbr\u003e\nGeneral\u003cbr\u003e\nRocker Stand Type: Pedestal\u003cbr\u003e\nRocker Stands Included: Built-In\u003cbr\u003e\nRocker Stand Dowels Included: N\/A\u003cbr\u003e\nUses Stock Rocker Bolts: No\u003cbr\u003e\nRocker Bolts Included: No\u003cbr\u003e\nRocker Arm Type: LS7 Exhaust 1.8 Ratio\u003cbr\u003e\nHead Bolt QTY: 4 Bolt Style\u003cbr\u003e\nValve Cover Rail Height: + ½ inch\u003cbr\u003e\nCan use OE Valve Cover: Yes\u003cbr\u003e\nCustom Options Available\u003c\/p\u003e","brand":"Mast Motorsports","offers":[{"title":"Default Title","offer_id":52041655386406,"sku":"CH-LTX-310514","price":2499.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/1666\/1542\/files\/mast_motorsports_factory_mast_1.jpg?v=1770811734","url":"https:\/\/billysspeedshop.com\/fr\/products\/mast-motorsports-factory-mast-4-065-bore-lt-heads-2-165-valve-size-ch-ltx-310514","provider":"Billys Speed Shop","version":"1.0","type":"link"}