Product Description:
Trick Flow ® Super 23 ® 175, Fast as Cast ® Assembled Cylinder Heads for V8 SBC Pre-86, 56cc 1.470" Springs. Sold Individually
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.
Cylinder heads are available fully assembled or as bare castings.
SPECS BELOW:
| Cylinder Head Style: | Assembled |
| Cylinder Head Material: | Aluminum |
| 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 |
| 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 |
| Intake Valve Diameter (in): | 1.940 in. |
| 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 |
| Valve Stem Seal Style: | Viton® fluoroelastomer |
| 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. |
| 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 |
