Trickflow Super 23 Cylinder Heads, SB Chevy, 195cc Intake, 64cc Chambers, 1.460" Dual Springs, Center Bolt

Manufacturer's Part Number: TFS-30410007-M64 Part Type: Cylinder Heads Product Line: Trick Flow® Super 23® 195 Cylinder Heads for Small Block Chevrolet Cylinder Head Style: Assembled Cylinder Head Material: Aluminum Intake Valve Diameter (in): 2.020 in. Cylinder Head Finish: Natural Combustion Chamber Volume (cc): 64 CNC-Machined Combustion Chamber: Yes Intake Runner Volume (cc): 195cc Exhaust Runner Volume (cc): 75cc 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): 1.600 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: 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: Tungsten 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 4.000 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 (pdf) To see a list of qualifying vehicles, enter CARB EO Number D-747-1 Emissions: California EO Approved