Serious horsepower for your Big Block Ford engine, heads sold individually and are fully assembled. PowerPort® cylinder heads for Ford 429/460 engines deliver significant horsepower and torque gains over similar-style cylinder heads. Highlights include an extremely efficient chamber design for more complete combustion and exhaust ports raised .270" from stock for increased airflow. Trick Flow PowerPort 325 heads are available with two runner configurations: • Heads with CNC Street Ported runners are great entry-level CNC heads featuring fully CNC-machined runners and combustion chambers with a standard resolution surface finish for significant performance gains over regular cast heads. • Heads with CNC Competition Ported runners feature CNC-profiled combustion chambers and runners with a premium high resolution surface finish for maximum, all-out performance.
Cylinder Head Style: Assembled
Cylinder Head Material: Aluminum
Cylinder Head Finish: Natural
Combustion Chamber Volume (cc): 78
CNC-Machined Combustion Chamber: Yes
Intake Runner Volume (cc): 325cc
Exhaust Runner Volume (cc): 145cc
CNC-Machined Intake Runner: Yes
CNC-Machined Exhaust Runner: Yes
Combustion Chamber Style: Heart
Intake Port Shape: Round
Intake Port Location: Standard
Exhaust Port Shape: D-port
Exhaust Port Location: Raised
Spark Plug Style: Angle
Intake Valves Included: Yes
Intake Valve Diameter (in): 2.250 in.
Exhaust Valves Included: Yes
Exhaust Valve Diameter (in): 1.760 in.
Valve Springs Included: Yes
Maximum Valve Lift (in): 0.650 in.
Outside Diameter of Outer Spring (in): 1.460 in.
Damper Spring Included: No
Number of Springs Per Valve: Dual
Retainers Included: Yes
Retainer Material: Chromoly Steel
Locks Included: Yes
Lock Style: 10 degree
Valve Stem Seals Included: Yes
Rocker Arm Studs Included: Yes
Rocker Arms Included: No
Rocker Arm Nuts Included: No
Rocker Arm Nut Thread Size: 7/16-20 in.
Guideplates Included: Yes
Guideplate Pushrod Size: 3/8"
Valve Cover Mounting Style: Perimeter bolt
Accessory Bolt Holes Drilled: Yes
Intake Valve Angle: 15/5
Exhaust Valve Angle: 15.25/4.5
Valve Guides Included: Yes
Valve Guide Material: Bronze
Valve Seats Machined: Yes
Valve Seat Machine Style: 3-angle
Valve Seat Material: Ductile iron
Steam Holes Drilled: No
Oiling Style: Through pushrod
Machined for O-Ring: No
Heat Crossover: No
Quantity: Sold individually
Notes:
Requires a Cobra Jet header. Exhaust port is raised 0.270 in. over stock.
