Trick Flow® Twisted Wedge® 11R 170 Cylinder Head for Small Block Ford

Manufacturer's Part Number: TFS-52515301-C00

 

Combustion Chamber Volume (cc): 53

 

Intake Runner Volume (cc): 170cc

 

Exhaust Runner Volume (cc): 66cc

 

Camshaft Style: Hydraulic roller

 

Intake Port Shape: Rectangular

 

Intake Valve Diameter (in.): 2.020 in.

 

CNC-Machined Combustion Chamber: Yes

 

CNC-Machined Intake Runner: Yes

 

CNC-Machined Exhaust Runner: Yes

 

Intake Port Location: Standard

 

Exhaust Port Shape: Square

 

Exhaust Port Location: Standard

 

Exhaust Valve Diameter (in.): 1.600 in.

 

Maximum Valve Lift (in.): 0.600 in.

 

Outside Diameter of Outer Spring (in.): 1.295 in.

 

Number of Springs Per Valve: Dual

 

Retainer Material: Chromoly steel

 

Lock Style: 7 degree

 

Rocker Arm Nut Thread Size: 7/16 in.-20

 

Guideplate Pushrod Size: 5/16 in.

 

Intake Valve Angle: 11

 

Exhaust Valve Angle: 13

 

Valve Guide Material: Bronze

 

Valve Seat Machine Style: 3-angle

 

Valve Seat Material: Ductile iron

 

Quantity: Sold individually.

 

Notes:

Street ported fully CNC, non-emissions head. For blocks that are machined for 7/16 in. head bolts, the use of TFS-51400419 head bolt bushings is required. Set-up for hydraulic roller camshafts.