{"product_id":"proflow-cylinder-heads-airmax-290-aluminium-bb-chevrolet-assembled-112cc-chamber-290cc-intake-runner-pair","title":"Proflow Cylinder Heads, AirMax 290, Aluminium, BB Chevrolet, Assembled, 112cc Chamber, 290cc Intake Runner, Pair","description":"\u003cp\u003e\u003cstrong\u003eProflow Cylinder Heads, AirMax 290, Aluminium, BB Chevrolet, Assembled\u003c\/strong\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003eProflow does not sacrifice quality for a low price--you get both with our aluminium cylinder heads. The lightweight heads are cast from A-356 aluminium alloy with a large choice of engine, for SB \u0026amp; BB Chevrolet, LS Chev Holden Ford SB 289-351W, 302, 351 Cleveland 2V \u0026amp; 3V \u0026amp; BB FE, and Chrysler SB \u0026amp; BB. They have phosphorous bronze valve guides, and ductile iron valve seats for use with unleaded gas. They're also end-milled and drilled for accessories. The fully assembled heads have stainless steel valves, high performance valve springs, 7 degree valve locks, rocker arm studs, and guideplates. Perfect for your Mild or High performance Hot Rod.\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cstrong\u003eSpecifications for Bare Cylinder Heads\u003c\/strong\u003e\u003c\/p\u003e\r\n\r\n\u003ctable border=\"0\" cellpadding=\"0\" cellspacing=\"0\" width=\"765\"\u003e\r\n\t\u003ccolgroup\u003e\r\n\t\u003c\/colgroup\u003e\r\n\t\u003ctbody\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd colspan=\"2\" height=\"19\" width=\"100%\"\u003eSpecifications \u0026amp; Features:\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eMaterial\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003eA356.2 Aluminum\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eIntake Port Volume\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e290cc\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\"\u003eIntake seat size\u003c\/td\u003e\r\n\t\t\t\u003ctd\u003e2.25 OR 2.30\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\"\u003eExhaust seat size\u003c\/td\u003e\r\n\t\t\t\u003ctd\u003e1.88\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eIntake Port Dimension\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e2.030\"H x 1.830\"W x1\/2 Radius\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eIntake Port Location\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003eStock\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eExhaust Port Volume\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e135cc\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eExhaust Port Dimension\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e1.770\"H x 2.010\" W\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eExhaust Port Location\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e.375\" Raised\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eCombustion Chamber Size\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e112cc\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eValve Cover Bolt Pattern\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003ePerimeter Bolt\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eValve Angle\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e24°\/4° Int, 15°\/4° Exh\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eValve Spring Pocket Diameter\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e1.725\" O.D\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e1.750\" O.D\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eDeck Thickness\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e.750\"\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eMinimum Bore Diameter\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e4.250\"\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eFlat Mill\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e.006\" per cc\/ Maximum 102cc\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eAngle Mill\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e.009\" per cc\/ Maximum 97cc\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd colspan=\"2\" height=\"19\" width=\"100%\"\u003eNote:Angle mills might require a .120\" Thick intake gasket.\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eMinimum Cross Sectional Area\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e2.895 sq. in.\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eSpark Plug Dimensions\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eIntake Valve Seat Machine Style:\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e5-angle\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\"\u003e \u003c\/td\u003e\r\n\t\t\t\u003ctd\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003e11\/32\" Intake Valve, 2.250\" x 5.500\" O.A.L\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003e11\/32\" Nail Head Exhaust Valve, 1.880\" x 5.450\" Overall Valve Length\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"38\" width=\"71.37254901960785%\"\u003e Racing Springs#1940 1.550\" O.D. Hydraulic Roller Dual Valve Spring, 175 lbs. on seat, .725\" maximum lift, 473lbs @ .600 lift, Max RPM 6500-6700\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"38\" width=\"71.37254901960785%\"\u003e Racing Spring 1.550 O.D. Solid Roller Valve Spring, 220lbs on seat, .710\" Maximum Lift, Max RPM 7200-7400 (upgrades available)\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eManley 10° Steel Retainers 1.500\" O.D x 1.120\"I.D x .705\" I.D\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003e10° 11\/32\" Valve Locks with lashcap recess\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eARP 7\/16\" Rocker Exhaust Studs\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eARP 7\/16\" Rocker Intake Studs\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003e 3\/8\" Guide Plates\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003e11\/32\" Viton Valve Seals\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eHardened Valve Spring I.D Locator 1.550\" O.D x .780\" I.D\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eIntake Valve Seats 2.450\" O.D x 1.950\" I.D x .375\" Deep\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eExhaust Valve Seats 2.000\" O.D x 1.580\" I.D x .375\" Deep\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003e11\/32\" Intake Bronze Valve Guides .502\" O.D x 2.10\" O.A.L\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003e11\/32\" Exhaust Bronze Valve Guides .502\" O.D x 2.25\" O.A.L\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003e \u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd colspan=\"2\" height=\"19\" width=\"100%\"\u003eRecommended Components:\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eIntake Port Gasket\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd colspan=\"2\" height=\"19\" width=\"100%\"\u003eImportant: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit the heads.\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eExhaust Port Gasket\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eHead Gasket, Fel-Pro #1047 (Mark V and VI)\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eHead Gasket,, Fel-Pro #1017-1 (Mark IV)\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eHead Bolts, ARP 135-3703 (Mark IV)\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eHead Bolts, ARP 135-3707 (Mark V)\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eHead Studs, ARP 235-4713\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eHead Bolt Washers, Manley\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eStud Girdle\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003e7\/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry)\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003e \u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003e1.7 Shaft Mount Rocker Arms \u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003eAftermarket\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eSuggested Manifold\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003eVictor Jr\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eSuggested Manifold\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003eRPM Performer\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\t\u003ctr\u003e\r\n\t\t\t\u003ctd height=\"19\" width=\"71.37254901960785%\"\u003eSpark Plug Starting Range\u003c\/td\u003e\r\n\t\t\t\u003ctd width=\"28.627450980392158%\"\u003eAutolite 3924\u003c\/td\u003e\r\n\t\t\u003c\/tr\u003e\r\n\t\u003c\/tbody\u003e\r\n\u003c\/table\u003e","brand":"Proflow","offers":[{"title":"Default Title","offer_id":55002577862869,"sku":"PFEAHBB290112","price":3388.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0825\/0635\/0805\/files\/PFEAHBB290112.jpg?v=1791288293","url":"https:\/\/sorgiovannimotorsport.com.au\/products\/proflow-cylinder-heads-airmax-290-aluminium-bb-chevrolet-assembled-112cc-chamber-290cc-intake-runner-pair","provider":"Sorgiovanni Motorsport","version":"1.0","type":"link"}