Patriot Performance GM Vortec 185cc Cylinder Heads

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Patriot Performance has taken the ''Vortec'' head one step further. They have designed these iron heads to work well on 350-383 applications. These have been very popular with street/strip customers and our round track customers love them! Available assembled with .575'' lift springs, 2.02''/1.60'' stainless valves. 3/8'' studs, and guide plates. Unique features of these heads are screw in 3/8'' studs, large spring pockets, Dual intake bolt patterns, center bolt or perimeter bolt valve covers, and improved intake and exhaust runners.



Technical Specs
Combustion Chamber: 64cc
Intake Runner: 185cc
Exhaust Runner: 60cc
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 Job: 5-angle
Material: Cast Iron