PRO1 20° 170cc
Excellent street, strip, oval track and truck or marine performance upgrade. Maximum torque and throttle response from idle to 6,000 RPM. Best for 302-351 cubic inch engines. Works with most standard components.
Small block Ford PRO1 20° 170cc Aluminum cylinder heads feature high flowing as cast ports with profiled valve guide bosses and are bowl blended on 5-axis CNC machining centers.
Standard valve angle and spacing is retained for bolt on compatibility. Exhaust runners are raised .135” for improved flow. Manganese Bronze valve guides are used for long life, and hardened valve seats provide durability with unleaded fuels.
Assemblies include Stainless Steel valves, premium springs, locks, retainers, guide plates and seals.
Heads are sold individually.
Material: RMR Cast Aluminum Alloy
Valve Angle: 20° (stock)
Intake Port Volume: 170cc
Intake Valve: 1.940”
Exhaust Valve: 1.600”
Chamber Volume: 58 or 62cc
PRO1 20° 170cc – Aluminum
58cc Combustion Chambers
13100080 – Bare Head
13101181 – 1.250” Single Springs for Hydraulic Flat Tappet Cam .510”
13101182 – 1.437” Dual Springs for Hydraulic Roller or Solid Flat Tappet Cam .620”
62cc Combustion Chambers
13110080 – Bare Head
13111181 – 1.250” Single Springs for Hydraulic Flat Tappet Cam .510”
13111182 – 1.437” Dual Springs for Hydraulic Roller or Solid Flat Tappet Cam .620”