Trick Flow® Super 23® 175 Cylinder Heads for Small Block Chevrolet TFS-30310001

Cylinder Head, Super 23® 175, Fast As Cast®, Assembled, 1.250 in. Springs, Chevy, Small Block, Each

Part Number:
TFS-30310001
Part Type:
UPC:
842645106095
Cylinder Head Style:
Assembled
Cylinder Head Material:
Aluminum
Intake Port Shape:
Rectangular
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 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):
0.520 in.
Outside Diameter of Outer Spring (in):
1.250 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:
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
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. 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

Made to outperform factory small block Chevy heads on 283-350 c.i.d. street performance engines, Trick Flow® Super 23® 175 cylinder 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—for about the same price as ordinary cast heads! Other features include angled spark plugs, raised valve cover rails, and extra-thick decks and walls for porting.

Super 23 175 heads are emissions-legal under CARB E.O. #D-747-1 for 1995 and earlier GM vehicles with Chevy 262–350 engines and accept most factory accessories. They are available fully assembled or as bare castings. Sold individually.

Warranty

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