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Return to Parts List Category : E- Big Block (Raised Deck) : Cylinder Heads TRF TFS-61617802-C00 240 STD PORT 10ºLOCKS .680" LIFT SPGS FULLY CNC'D HEAD ASSEMBLED WITH 10º LOCKS, STEEL RETAINERS & SPRINGS $1419.99 Trick Flow® PowerPort® 240 Cylinder Head for Big Block Mopar 10º locks, steel retainers, Dual Springs w/ 138# seat / 430# @ .700" open / .680" max lift Trick Flow PowerPort® 240 heads for big block Mopar are superior to stock and other aftermarket aluminum heads for several reasons. PowerPort 240 heads are made from premium grade A356-T61 aluminum because it is very strong and weighs a lot less than cast iron. The rocker shaft and runner areas have been enhanced to increase strength, and the oil holes for the rocker shafts were relocated to improve oiling. The shape of the runners was optimized to increase flow velocity and add much needed strength to the shaft bosses. The combustion chambers and runners are fully CNC Street Ported to guarantee proper dimensional accuracy and balanced flow from runner-to-runner. Other advantages of PowerPort 240 heads over stock heads include clearance for 3/8"" pushrods, ductile iron valve seats, bronze alloy valve guides, and multi-angle valve seat machining performed on precision Serdi® equipment. Assembled cylinder heads come with premium 11/32"" stainless steel valves, Trick Flow by PAC Racing valve springs, chromoly and titanium retainer options, and 7° or 10° steel valve stem locks. Trick Flow designed the PowerPort 240 heads to use all factory-style big block Mopar pistons, roller rocker arms, intake manifolds, and headers.   Single Cylinder Head, PowerPort® 240, Aluminum, Assembled, 78cc Chamber, Mopar, Big Block. 2.190" Intake valve 1.760" Exhaust valve 10º Steel Retainers 240cc Intake runner volume 74cc Exhaust runner volume Standard intake port location Standard exhaust port location Ductile iron valve seats Bronze alloy guides Viton® Flouroelastomer valve stem seals Spring information (made by PAC Racing Springs) Dual spring with damper 1.550" O.D. 138# @ 1.950" installed height 430# @ .700" open pressure .680" max lift Related Parts:   ARP Head Bolt Kit  ARP 145-3609   ARP Head Stud Kit  ARP 145-4012   Rocker shaft Hold Down Kit  HUG 7442TF Flow chart provided by Trick Flow®