{"product_id":"air-flow-research-afr1840-260cc-mongoose-alloy-cylinder-heads-6-bolt-suit-gm-ls-series-ls3","title":"Air Flow Research AFR1840 260cc Mongoose Alloy Cylinder Heads 6-Bolt suit Gm LS Series LS3","description":"\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif;\"\u003eAFR's 260cc LS3 \"Mongoose\" heads feature 100% CNC ported intake, exhaust and chambers using our advanced engineering and flow techniques to produce the ultimate Rectangle Port head available today. Featuring A356 aluminium castings, titanium retainers and the highest quality components, throughout. They're designed for 4.000 or larger bore applications up to 454 CI, operating up to 7000 RPM\u003c\/span\u003e\u003c\/p\u003e \u003cbr\u003e\u003cbr\u003e\u003cp style=\"background: none; list-style: square; margin: 0px 5px 5px 15px; padding: 0px 0px 5px 5px; outline: 0px; border: 0px currentColor; border-image: none; color: rgb(79, 79, 79); line-height: 20px; vertical-align: baseline;\"\u003eApplication: Chevy small block Gen III\/IV 6.0L 6.2L 7.0L \u003c\/p\u003e  \u003cp style=\"background: none; list-style: square; margin: 0px 5px 5px 15px; padding: 0px 0px 5px 5px; outline: 0px; border: 0px currentColor; border-image: none; color: rgb(79, 79, 79); line-height: 20px; vertical-align: baseline;\"\u003eCylinder Head Style: Assembled\u003cbr\u003e Cylinder Head Material: Aluminum\u003cbr\u003e Cylinder Head Finish: Natural\u003cbr\u003e Combustion Chamber Volume (cc): 69\u003cbr\u003e CNC-Machined Combustion Chamber: Yes\u003cbr\u003e Intake Runner Volume (cc): 260cc\u003cbr\u003e Exhaust Runner Volume (cc): 95cc\u003cbr\u003e CNC-Machined Intake Runner: Yes\u003cbr\u003e CNC-Machined Exhaust Runner: Yes\u003cbr\u003e Combustion Chamber Style: Heart\u003cbr\u003e Intake Port Shape: Rectangular\u003cbr\u003e Intake Port Location: Standard\u003cbr\u003e Exhaust Port Shape: Oval\u003cbr\u003e Exhaust Port Location: Standard\u003cbr\u003e Spark Plug Style: Angle\u003cbr\u003e Intake Valves Included: Yes\u003cbr\u003e Intake Valve Diameter (in): 2.165 in.\u003cbr\u003e Exhaust Valves Included: Yes\u003cbr\u003e Exhaust Valve Diameter (in): 1.600 in.\u003cbr\u003e Valve Springs Included: Yes\u003cbr\u003e Maximum Valve Lift (in): 0.650 in.\u003cbr\u003e Outside Diameter of Outer Spring (in): 1.270 in.\u003cbr\u003e Damper Spring Included: Yes\u003cbr\u003e Number of Springs Per Valve: Dual\u003cbr\u003e Retainers Included: Yes\u003cbr\u003e Retainer Material: Titanium\u003cbr\u003e Locks Included: Yes\u003cbr\u003e Lock Style: 7 degree\u003cbr\u003e Valve Stem Seals Included: Yes\u003cbr\u003e Valve Stem Seal Style: Umbrella\u003cbr\u003e Rocker Arm Studs Included: No\u003cbr\u003e Rocker Arms Included: No\u003cbr\u003e Rocker Arm Nuts Included: No\u003cbr\u003e Guideplates Included: No\u003cbr\u003e Valve Cover Mounting Style: Centerbolt\u003cbr\u003e Accessory Bolt Holes Drilled: Yes\u003cbr\u003e Intake Valve Angle: 12\u003cbr\u003e Exhaust Valve Angle: 12\u003cbr\u003e Valve Guides Included: Yes\u003cbr\u003e Valve Guide Material: Bronze\u003cbr\u003e Valve Seats Machined: No\u003cbr\u003e Valve Seat Material: Ductile iron\u003cbr\u003e Steam Holes Drilled: No\u003cbr\u003e Oiling Style: Through pushrod\u003cbr\u003e Machined for O-Ring: No\u003cbr\u003e Heat Crossover: No\u003cbr\u003e Quantity: Sold as a pair.\u003cbr\u003e Notes: For 4.0 in. and larger cylinder bore. Designed for six bolt blocks. It's the customer's responsibility to verify proper piston to valve clearance\u003c\/p\u003e","brand":"AFR - Air Flow Research","offers":[{"title":"Default Title","offer_id":44538844086583,"sku":"AFR1840","price":6363.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/9364\/1015\/files\/34878_e0bf6d14-a21a-4766-aa83-ecb4a19cfe39.jpg?v=1780723947","url":"https:\/\/enginemaster.com.au\/products\/air-flow-research-afr1840-260cc-mongoose-alloy-cylinder-heads-6-bolt-suit-gm-ls-series-ls3","provider":"Engine Master","version":"1.0","type":"link"}