{"product_id":"dart-da13311182-ford-sb-iron-eagle-cylinder-heads-180cc-intake-62cc-chamber-1-437-dual-springs-each","title":"DART DA13311182 Ford SB Iron Eagle Cylinder Heads 180cc Intake 62cc Chamber 1.437\" Dual Springs (each)","description":"\u003cp\u003eDart's Iron Eagle heads for small block Fords are a true bolt on performance upgrade for the highly popular 289\/302\/351 family of engines. Made from premium cast iron and precision machined on our digital CNC machining centers, these heads are ready to go right out of the box. Intake runners are increased from stock size and feature streamlined valve guide bosses for improved air flow. The combustion chambers have been reshaped to improve combustion efficiency for increased power.\u003c\/p\u003e  \u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e  \u003cul\u003e  \u003cli\u003ePremium cast iron for superior strength and integrity.\u003c\/li\u003e  \u003cli\u003eBolt on compatibility: Standard valve angle and standard spacing accommodates all stock accessories.\u003c\/li\u003e  \u003cli\u003e185cc intake ports provide a serious upgrade for stock units.\u003c\/li\u003e  \u003cli\u003eHeart shaped chambers improve combustion efficiency.\u003c\/li\u003e  \u003cli\u003eMulti-angle intake seats and radiused exhaust seats improve flow efficiency.\u003c\/li\u003e  \u003cli\u003eHardened exhaust seats are compatible with unleaded gasoline.\u003c\/li\u003e  \u003cli\u003eExhaust flange uses the standard bolt pattern.\u003c\/li\u003e  \u003cli\u003eManganese bronze valve guides ensure long term reliability.\u003c\/li\u003e \u003c\/ul\u003e \u003cbr\u003e\u003cbr\u003e\u003cul\u003e  \u003cli\u003eCombustion Chamber Volume (cc):62\u003c\/li\u003e  \u003cli\u003eIntake Runner Volume (cc):180cc\u003c\/li\u003e  \u003cli\u003eExhaust Runner Volume (cc):73cc\u003c\/li\u003e  \u003cli\u003eCylinder Head Style:Assembled\u003c\/li\u003e  \u003cli\u003eCylinder Head Material:Cast iron\u003c\/li\u003e  \u003cli\u003eIntake Port Shape:Rectangular\u003c\/li\u003e  \u003cli\u003eIntake Valve Diameter (in):1.940 in.\u003c\/li\u003e  \u003cli\u003eCylinder Head Finish:Natural\u003c\/li\u003e  \u003cli\u003eCNC-Machined Combustion Chamber:No\u003c\/li\u003e  \u003cli\u003eCNC-Machined Intake Runner:No\u003c\/li\u003e  \u003cli\u003eCNC-Machined Exhaust Runner:No\u003c\/li\u003e  \u003cli\u003eIntake Port Location:Standard\u003c\/li\u003e  \u003cli\u003eExhaust Port Location:Standard\u003c\/li\u003e  \u003cli\u003eIntake Valves Included:Yes\u003c\/li\u003e  \u003cli\u003eExhaust Valves Included:Yes\u003c\/li\u003e  \u003cli\u003eExhaust Valve Diameter (in):1.600 in.\u003c\/li\u003e  \u003cli\u003eValve Springs Included:Yes\u003c\/li\u003e  \u003cli\u003eMaximum Valve Lift (in):0.620 in.\u003c\/li\u003e  \u003cli\u003eOutside Diameter of Outer Spring (in):1.437 in.\u003c\/li\u003e  \u003cli\u003eDamper Spring Included:No\u003c\/li\u003e  \u003cli\u003eNumber of Springs Per Valve:Dual\u003c\/li\u003e  \u003cli\u003eRetainers Included:Yes\u003c\/li\u003e  \u003cli\u003eRetainer Material:Chromoly steel\u003c\/li\u003e  \u003cli\u003eLocks Included:Yes\u003c\/li\u003e  \u003cli\u003eLock Style:10 degree\u003c\/li\u003e  \u003cli\u003eValve Stem Seals Included:Yes\u003c\/li\u003e  \u003cli\u003eRocker Arm Studs Included:Yes\u003c\/li\u003e  \u003cli\u003eRocker Arm Nut Thread Size:3\/8-24 in.\u003c\/li\u003e  \u003cli\u003eRocker Arms Included:No\u003c\/li\u003e  \u003cli\u003eRocker Arm Nuts Included:No\u003c\/li\u003e  \u003cli\u003eGuideplates Included:Yes\u003c\/li\u003e  \u003cli\u003eGuideplate Pushrod Size:5\/16 in.\u003c\/li\u003e  \u003cli\u003eValve Cover Mounting Style:Perimeter bolt\u003c\/li\u003e  \u003cli\u003eAccessory Bolt Holes Drilled:Yes\u003c\/li\u003e  \u003cli\u003eIntake Valve Angle:20\u003c\/li\u003e  \u003cli\u003eExhaust Valve Angle:20\u003c\/li\u003e  \u003cli\u003eValve Guides Included:Yes\u003c\/li\u003e  \u003cli\u003eValve Guide Material:Manganese bronze\u003c\/li\u003e  \u003cli\u003eValve Seats Machined:Yes\u003c\/li\u003e  \u003cli\u003eValve Seat Machine Style:5-angle intake\/3-angle exhaust\u003c\/li\u003e  \u003cli\u003eValve Seat Material:Ductile iron\u003c\/li\u003e  \u003cli\u003eSteam Holes Drilled:No\u003c\/li\u003e  \u003cli\u003eOiling Style:Through pushrod\u003c\/li\u003e  \u003cli\u003eMachined for O-Ring:No\u003c\/li\u003e  \u003cli\u003eHeat Crossover:No\u003c\/li\u003e  \u003cli\u003eQuantity:Sold individually.\u003c\/li\u003e \u003c\/ul\u003e","brand":"Dart","offers":[{"title":"Default Title","offer_id":44605741695287,"sku":"DA13311182","price":1396.6,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/9364\/1015\/files\/69390.jpg?v=1780355312","url":"https:\/\/enginemaster.com.au\/products\/dart-da13311182-ford-sb-iron-eagle-cylinder-heads-180cc-intake-62cc-chamber-1-437-dual-springs-each","provider":"Engine Master","version":"1.0","type":"link"}