Give your Ford 390-428 more go with Trick Flow's PowerPort® 175 cylinder heads. A direct bolt-on for all 1961-76 FE engines, the heads are made from top-quality A356-T61 aluminum so they're much lighter but still as strong as OE castings. Specially optimized intake runners increase airflow velocity, and Trick Flow's extraordinary CNC Street Ported treatment guarantees proper dimensional accuracy and balance between the runners. Other performance improvements of the PowerPort175® heads include bronze alloy valve guides, ductile iron valve seats, and multi-angle valve seat machining on SerdiR equipment. Assembled cylinder heads include premium 11/32" stainless steel valves, Trick Flow by PAC Racing valve springs, 7° or 10° steel valve stem locks, and chromoly or titanium retainer options.
The heads are available fully assembled or as bare castings. Sold as a pair.
Spring Rate: 140lb on the seat/ 440lb open
Cylinder Head Material:Aluminum
Intake Port Shape:Rectangular
Intake Valve Diameter (in):2.190 in.
Cylinder Head Finish:Natural
Combustion Chamber Volume (cc):70
CNC-Machined Combustion Chamber:Yes
Intake Runner Volume (cc):175cc
Exhaust Runner Volume (cc):113cc
CNC-Machined Intake Runner:Yes
CNC-Machined Exhaust Runner:Yes
Combustion Chamber Style:Heart
Intake Port Location:Standard
Exhaust Port Shape:D-port
Exhaust Port Location:Standard
Intake Valves Included:Yes
Exhaust Valves Included:Yes
Exhaust Valve Diameter (in):1.625 in.
Valve Springs Included:Yes
Maximum Valve Lift (in):0.680 in.
Outside Diameter of Outer Spring (in):1.550 in.
Damper Spring Included:Yes
Number of Springs Per Valve:Dual
Valve Stem Seals Included:Yes
Rocker Arm Studs Included:No
Rocker Arm Nuts Included:No
Valve Cover Mounting Style:Perimeter bolt
Accessory Bolt Holes Drilled:Yes
Valve Guides Included:Yes
Valve Guide Material:Bronze
Valve Seat Machine Style:3-angle
Valve Seat Material:Ductile iron
Oiling Style:Through head
Quantity:Sold as a pair*