M-6049-SCJ* Bare Head M-6049-SCJA* Assembled Head for 429-460 Engines M-6049-SCJB* Assembled Head for 514 Engines Revised valve angles and locations to reduce cylinder wall shrouding and improve flow Redesigned combustion chambers to accommodate the more centrally located valves Uses same valves, valve springs, retainers and standard 7/16" stud mounted roller rockers as current Ford Racing 429 Cobra Jet cylinder heads. Requires new pushrod guide plates (M-6566-SCJ) and new pushrods, M-6565-P460 or R460 Standard Cobra Jet intake and exhaust manifolds bolt on Current valve covers fit 2.200" intake valve, 1.76" exhaust valve Flows approximately 330 cfm intake and 225 cfm exhaust 72cc combustion chambers 290cc intake runner, 148cc exhaust runner 25-50 HP increase over current Ford Racing aluminum Cobra Jet heads depending on displacement and camshaft The best street/strip Ford big block cylinder head on the market today! Uses Motorcraft AGSP series spark plugs NOTE: If replacing current or production Cobra Jet heads, new intake valve notches are required

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