Part Number:
TFS-51410004-M61
UPC:
842645111143
Combustion Chamber Volume (cc):
61
Intake Runner Volume (cc):
170cc
Exhaust Runner Volume (cc):
66cc
Cylinder Head Style:
Assembled
Cylinder Head Material:
Aluminum
Intake Port Shape:
Rectangular
Intake Valve Diameter (in.):
2.020 in.
Cylinder Head Finish:
Natural
CNC-Machined Combustion Chamber:
Yes
CNC-Machined Intake Runner:
No
CNC-Machined Exhaust Runner:
No
Combustion Chamber Style:
Twisted Wedge®
Intake Port Location:
Standard
Exhaust Port Shape:
Square
Exhaust Port Location:
Standard
Intake Valves Included:
Yes
Exhaust Valves Included:
Yes
Exhaust Valve Diameter (in.):
1.600 in.
Valve Springs Included:
Yes
Maximum Valve Lift (in.):
0.600 in.
Outside Diameter of Outer Spring (in.):
1.460 in.
Damper Spring Included:
Yes
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 Arm Nut Thread Size:
3/8 in.-24
Rocker Arms Included:
No
Rocker Arm Nuts Included:
No
Guideplates Included:
Yes
Guideplate Pushrod Size:
5/16 in.
Accessory Bolt Holes Drilled:
Yes
Intake Valve Angle:
15
Exhaust Valve Angle:
17
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:
Yes
Quantity:
Sold individually.
Notes:
Designed for hydraulic roller camshafts. Trick Flow twisted wedge pistons are required for use with these heads to allow for piston to valve clearance with camshafts over .550 in. lift. Valve cover rail is raised .350 in. over stock.
CARB EO Number:
D-747-1 (pdf)
To see a list of qualifying vehicles, enter CARB EO Number D-747-1
Emissions:
California EO Approved
Trick Flow’s legendary Twisted Wedge® 170 series cylinder heads are better than ever! The A356-T61 aluminum castings have been redesigned on the exhaust side to improve strength and water jacket integrity for durability in street and entry level strip applications. All of the unique features that made Twisted Wedge series heads so dominant in high performance and racing are still here—Twisted Wedge combustion chambers and valve layout, high-flow/high-velocity intake runners, and top-quality valvetrain components—plus CNC-profiled combustion chambers with port-to-valve seat blending (bowl blending) and refined Fast As Cast® runners that deliver near-CNC-ported power and airflow at cast head prices.

Certain Twisted Wedge 170 heads are emissions-legal under CARB E.O. #D-747-1 for 1996 and earlier Ford 289, 302,
and 351W engines. The heads are available fully assembled or as bare castings. Sold individually.