| Brand: | Speedmaster |
| Part Number: | PCE281.2158 |
| Part Type: | Cylinder Head [Assembled] |
| Product Line: | Hydraulic Flat Tappet |
| Cylinder Head Style: | Assembled |
| Cylinder Head Material: | Cast Iron |
| Cylinder Head Finish: | Natural |
| Combustion Chamber Volume (cc): | 59 cc |
| CNC-Machined Combustion Chamber: | No |
| Intake Runner Volume (cc): | 175 cc |
| Exhaust Runner Volume (cc): | n/a |
| CNC-Machined Intake Runner: | No |
| CNC-Machined Exhaust Runner: | No |
| Intake Port Shape: | Rectangular |
| Intake Port Location: | Standard |
| Exhaust Port Shape: | Square |
| Exhaust Port Location: | Standard |
| Spark Plug Style: | Straight |
| Comp. Valve Job: | No |
| 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): | 0.580 in. |
| Outside Diameter of Outer Spring (in): | 1.250 in. |
| Number of Springs Per Valve: | Single |
| Damper Spring Included: | Yes |
| Retainers Included: | Yes |
| Retainer Material: | Chromoly steel |
| Locks Included: | Yes |
| Lock Style: | 7 degree |
| Valve Stem Seals Included: | Yes |
| Rocker Arm Studs Included: | NoÊ |
| Rocker Arms Included: | NoÊ |
| Rocker Arm Nuts Included: | NoÊ |
| Guideplates Included: | NoÊ |
| Valve Cover Mounting Style: | Center & Perimeter Bolt |
| Accessory Bolt Holes Drilled: | YesÊ |
| Intake Valve Angle: | 23 deg. |
| Exhaust Valve Angle: | 23 deg. |
| Valve Guides Included: | YesÊ |
| Valve Guide Material: | BronzeÊ |
| Valve Seats Machined: | Yes |
| Valve Seat Machine Style: | 3-angle |
| Valve Seat Material: | Ductile ironÊ |
| Steam Holes Drilled: | No |
| Oiling Style: | Through pushrodÊ |
| Machined for O-Ring: | NoÊ |
| Heat Crossover: | No |
| Quantity: | Sold as a pair. |
