CHEV 350 SBC Cyliner Head 

Description

These heads are designed for entry-level street performance engines and ideal for operating in the idle to 6500 rpm range. Made from A356 aluminium castings, these complete heads include larger-than-stock 1.43" (36.3mm) dual valve springs to handle up to 0.575" (14.61mm) maximum valve lift. They produce CNC flow numbers and flow over 250cfm on the 183cc and over 280cfm on the 200cc. The combination of a 5-angle competition valve job, diamond-honed bronze guides, hand bowl blending, and professional assembly means these heads outperform some of the best brands in the business. Recommended spark plugs are 14mm x 3/4" reach with flat gasket seat.

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Specifications

Combustion Chamber Volume:    64cc Chamber 
Exhaust Runner Volume:  70cc
Intake Runner Volume:  AF95-2327  180cc / AF95-2350 200cc 
Valve Spring Diameter: 1.430" (36.3mm) Dual springs
Valve Material: Stainless Steel
Valve Guide Material: Manganese Bronze
Valve Stem Seal Material: Viton
Maximum Valve Spring Lift:  .575"
Spring Installed Height: 1.85"
Spring Pressure: 100lbs@ 1.85" / 300lbs@ 0.575"
Outer Diameter of Outer Spring: 1.430" dual with internal spring

Guide Plate Pushrod Size: 5/16" (must use hardened Pushrods)
Spark Plug Style: Straight
Rocker Stud Thread Size: 7/16" 
Lock Style: 7 Degree
Maximum Valve Lift: 0.575" (14.61mm)
Intake Port Volume: 180cc
Intake Valve Diameter: 2.02"
Exhaust Port Volume: 70cc 
Exhaust Valve Diameter: 1.60"
Recommended Intake Gaskets: FELPRO 1206
Recommended Exhaust Gaskets: FELPRO 1406

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