Trick Flow Super 23 SBC 175cc Cylinder Heads, 56cc Chambers, 1.470" Valve Springs, Center Bolt

Manufacturer's Part Number: TFS-30310006

Part Type: Cylinder Heads Product Line: Trick Flow® Super 23® 175 Cylinder Heads for Small Block Chevrolet

Cylinder Head Style: Assembled

Cylinder Head Material: Aluminum

Intake Valve Diameter (in): 1.940 in.

Cylinder Head Finish: Natural

Combustion Chamber Volume (cc): 56

CNC-Machined Combustion Chamber: No

Intake Runner Volume (cc): 175cc

Exhaust Runner Volume (cc): 67cc

CNC-Machined Intake Runner: No

CNC-Machined Exhaust Runner: No

Combustion Chamber Style: Heart

Intake Port Shape: Rectangular

Intake Port Location: Standard

Exhaust Port Shape: D-port

Exhaust Port Location: Standard

Spark Plug Style: Angle

Intake Valves Included: Yes

Exhaust Valves Included: Yes

Exhaust Valve Diameter (in): 1.500 in.

Valve Springs Included: Yes

Maximum Valve Lift (in): 0.540 in.

Outside Diameter of Outer Spring (in): 1.470 in.

Damper Spring Included: Yes

Number of Springs Per Valve: Single

Retainers Included: Yes

Retainer Material: Chromoly steel

Locks Included: Yes

Lock Style: 7 degree

Valve Stem Seals Included: Yes

Rocker Arm Studs Included: Yes

Rocker Arm Nut Thread Size: 3/8-24 in.

Rocker Arms Included: No

Rocker Arm Nuts Included: No

Guideplates Included: Yes

Guideplate Pushrod Size: 5/16 in.

Valve Cover Mounting Style: Centerbolt

Accessory Bolt Holes Drilled: Yes

Intake Valve Angle: 23

Exhaust Valve Angle: 23

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: These heads only fit engines with a 3.736 in. bore or larger. 1987-1995 intake manifold bolt pattern. Requires drilling steam holes into head on 400 c.i. applications. CARB EO Number: D-747-1

CARB EO Number D-747-1 Emissions: California EO Approved