Trick Flow® Twisted Wedge® 185 series cylinder heads are the best aftermarket heads for modular-powered Fords. The secret: Twisted Wedge combustion chambers and intake valves moved on the opposite side of the cam. The result is dramatic increases in mid-lift airflow, piston-to-valve clearance, and valve-to-bore clearance for using higher lift cams and larger valves without altering bore size or flycutting pistons. Other exclusive features include OE PI-style intake inlets, Fast As Cast® runners that deliver near-CNC-ported airflow, CNC-profiled combustion chambers, 3/4" thick decks, patented replaceable cam bearing journals, and 3/4"-reach spark plugs.

Twisted Wedge 185 heads are intended for mildly modified engines. The heads fit all 2V Romeo and Windsor engines and accept all OE-style camshafts, followers, lash adjusters, valve covers, and most OE Ford front covers.

Cylinder Head Style: Assembled
CNC-Machined Ports: No
Port Finish Type: Fast As Cast®
Emissions Status: Non-emissions
Intake Port Volume: 185cc
Combustion Chamber Volume: 38cc CNC-profiled
Minimum Bore Diameter: 3.552 in.
Material: A356-T61 aluminum
Combustion Chamber Shape: Twisted Wedge®
Intake Valve Angle: 9 degree
Intake Port Location: Stock
Intake Port Shape: OE Ford PI
Intake Port Dimensions: 1.500 in. x 1.880 in.
Intake Valve Diameter: 1.840 in.
Intake Valve Seat: Ductile iron
Exhaust Valve Angle: 9 degree
Exhaust Port Volume: 93cc
Exhaust Port Location: Stock
Exhaust Port Shape: D-port
Exhaust Port Dimensions: 1.470 in. x 1.250 in.
Exhaust Valve Diameter: 1.450 in.
Exhaust Valve Seat: Ductile iron
Valve Guide Material: Trick-Alloy powdered metal
Valve Seals: Viton® fluoroelastomer
Valve Seat Angles: 45 degree x multi-angle
Valve Spring Pocket Diameter: 1.180 in.
Valve Spring Retainers: Chromoly steel
Valve Stem Locks: 7 degree
Valve Springs Included: Yes
Valve Springs: .940 in./1.050 in. o.d. beehive spring
Valve Spring Seat Load: 90 lbs. @ 1.600 in. installed height
Valve Spring Open Load: 205 lbs. @ 1.020 in. open
Valve Spring Rate: 209 lbs. per inch rate
Valve Spring Maximum Valve Lift: .600 in.
Valve Cover Style: Perimeter bolt
Spark Plug Style: Angle
Accessory Bolt Holes Drilled/Tapped: Yes
O-Ring Grooves: No
Heat Crossovers: No
Steam Holes: No
Quantity: Sold individually.
Notes: Accepts all Romeo and Windsor valve covers plus most OE Ford front covers with 8 mm head bolt holes.Learn More