Trick Flow Cylinder Head Twisted Wedge 170cc Intake 2.02/1.60 Valves Dual Springs 58cc Chambers 289/302/351W
Trick Flow Twisted Wedge Cylinder Head with 170cc Intake Runners, 2.02/1.60 Intake/Exhaust Valves, Dual Springs and 58cc Combustion Chambers for 289, 302 and 351W Engines.
Twisted Wedge series heads are known for their twisted wedge combustion chambers and valve layout, high flow/high velocity intake runners, top quality valvetrain components and CNC-profiled combustion chambers with bowl blending (Port-to-valve seat blending). Refined Fast As Cast runners deliver near-CNC-ported power and air flow at cast cylinder head prices. This cylinder head comes fully assembled.
This cylinder head is 50-state emissions legal under CARB E.O. number D-369-18 for 1996 and earlier Ford 289, 302 and 351W engines.
Trick Flow Twisted Wedge 170 series cylinder heads are made from A356-T61 aluminum castings which have been redesigned on the exhaust side to improve strength and water jacket integrity for increased durability.
Cylinder Head Specifications:
- Cylinder Head Style: Assembled
- CNC-Machined Ports: No
- Port Finish Type: Fast As Cast
- Emissions Status: 50-state emissions legal
- CARB E.O. #: D-369-18
- Intake Port Volume: 170cc
- Combustion Chamber Volume: 58cc CNC-profiled
- Minimum Bore Diameter: 4.000 in
- Material: A356-T61 aluminum
- Combustion Chamber Shape: Twisted Wedge
- Intake Valve Angle: 15 degree
- Intake Port Location: Stock
- Intake Port Shape: Rectangular
- Intake Port Dimensions: 1.200 in x 2.000 in
- Intake Valve Diameter: 2.020 in
- Intake Valve Seat: Ductile iron
- Exhaust Valve Angle: 17 degree
- Exhaust Port Volume: 66cc
- Exhaust Port Location: Stock
- Exhaust Port Shape: Square
- Exhaust Port Dimensions: 1.250 in x 1.500 in
- Exhaust Valve Diameter: 1.600 in
- Exhaust Valve Seat: Ductile iron
- Valve Guide Material: Bronze alloy
- Valve Seals: Viton® fluoroelastomer
- Valve Seat Angles: 45 degree x multi-angle
- Valve Spring Pocket Diameter: 1.615 in
- Valve Spring Cups: 1.480 in
- Valve Spring Retainers: Chromoly steel
- Valve Stem Locks: 7 degree
- Valve Springs Included: Yes
- Valve Springs: 1.460 in outer diameter dual spring with damper
- Valve Spring Seat Load: 125 lbs @ 1.800 in installed height
- Valve Spring Open Load: 376 lbs @ 1.260 in open
- Valve Spring Rate: 420 lbs per inch rate
- Valve Spring Maximum Valve Lift: .600 in
- Guideplates: 5/16 in
- Rocker Arm Studs: 3/8 - 24
- Valve Cover Style: Perimeter bolt
- Spark Plug Style: Angle
- Accessory Bolt Holes Drilled/Tapped: Yes
- O-Ring Grooves: No
- Heat Crossovers: Yes
- Steam Holes: No
- Quantity: Sold individually
*The valve cover rail is raised .350 inches over the stock height.
*Requires Twisted Wedge specific pistons for proper piston-to-valve clearance.
California Residents: Proposition 65 Warning
This item is 50-state legal (CARB E.O. Number D-747-1)
Advanced skill is required for this installation.