Patriot Performance 2181 - Patriot Performance SB-Chevy 190CC Freedom Series Heads

Patriot Performance has taken their ''As-Cast'' Freedom Series 185cc heads, performed their 5 angle 2.02''/1.60'' valve job, CNC Bowl Blend & Gasket Match to promote flow. This yields a great flowing 190cc runner. To this they added only the highest quality 21-4N 2.02''/1.60'' stainless valves, .575'' lift (hyd. flat tappet) springs, steel retainers, 3/8'' studs, bronze guides, and guideplates. These heads are a great addition to engine builds up to 383 CI.
Sold as Pair



Technical Specs:
Combustion Chamber: 64cc
Intake Runner: 190cc
Exhaust Runner: 62cc
Intake Valve: 2.02''
Exhaust Valve: 1.60''
Max. Valve Spring Lift: 0.575''
Spring Pressure Closed: 115 lbs. @ 1.800''
Spring Pressure Open: 310 lbs. @ 1.225''
Retainer Material: Steel
Valve Seal Material: Viton
Valve Guide Material: Manganese Bronze
Valve Job: 5-angle
Uses .750 reach gasket seat spark plugs (Autolite 410-AR3924 Suggested)