Trick Flow® Super 23® 175 Cylinder Heads for Small Block Chevrolet TFS-30310002

Trick Flow ® Super 23 ® 175 cylinder heads give you performance that closely matches CNC-ported cylinder heads—for about the same price as ordinary cast heads! Made to outperform factory small block Chevy heads on 283-350 c.i.d. street performance engines, the Super 23 175 heads feature small cross-section intake runners to promote low-rpm torque and high-rpm horsepower on small bore engines. Fast As Cast ® runners duplicate the runner profile and performance levels of CNC-ported heads. Other features include angled spark plugs, raised valve cover rails, and extra-thick decks and walls for porting.

Trick Flow ® Super 23 ® 175 heads are a direct fit, high performance replacement for factory heads and accept most original accessories. They are emissions-legal under CARB E.O. #D-747-1 for 1995 and earlier GM vehicles with Chevy 262–350 engines and accept most accessories. The heads are available fully assembled or as bare castings. Sold individually.Brand: Trick Flow Specialties
Manufacturer's Part Number: TFS-30310002
Part Type: Cylinder Heads
Product Line: Trick Flow ® Super 23 ® 175 Cylinder Heads for Small Block Chevrolet
HP Direct Part Number: TFS-30310002
UPC: 842645106101
Combustion Chamber Volume (cc): 56
Intake Runner Volume (cc): 175cc
Exhaust Runner Volume (cc): 67cc
Cylinder Head Style: Assembled
Cylinder Head Material: Cast aluminum
Camshaft Style: Hydraulic flat tappet
Intake Port Shape: Rectangular
Intake Valve Diameter (in.): 1.940 in.
CNC-Machined Combustion Chamber: No
CNC-Machined Intake Runner: No
CNC-Machined Exhaust Runner: No
Combustion Chamber Style: Heart
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 in.-24
Rocker Arms Included: No
Rocker Arm Nuts Included: No
Guideplates Included: Yes
Guideplate Pushrod Size: 5/16 in.
Valve Cover Mounting Style: Perimeter bolt
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
Cylinder Head Color: Natural
Steam Holes Drilled: No
Oiling Style: Through pushrod
Machined for O-Ring: No
Heat Crossover: Yes
Remanufactured: No
Quantity: Sold individually.
Notes: These heads only fit engines with a 3.736 in. bore or larger. Requires drilling steam holes into head on 400 c.i. applications.
CARB EO Number(s): D-747-1
Emissions: California EO Approved