Nason Cylinder head - bare - 909302

Specifications
Combustion Chamber Volume:	61cc
Intake Runner Volume:	185cc
Intake Port Size H x W:	2.020" x 1.126"
Exhaust Runner Volume:	65cc
Exhaust Port Size H x W:	1.362" x 1.354"
Spark Plug Angle:	Angle
Intake Valve Size:	2.020"/51.30mm
Exhaust Valve Size:	1.600"/40.64mm
Valve Length:	Chev Small Block
Valve Guide Seal Diameter:	0.531"/13.48mm
Valve Guide Material:	Manganese Bronze
Maximum Valve Spring Diameter:	1.550"/39.37mm

Description

Bare Head - Alloy Performance - 61cc Chamber

Spark Plugs, Thread = 14mm x 1.25mm, Seat = Gasket, Reach = 19mm

Requires Screw In Rocker Studs & Guide Plates

Flow Data @ 28"(CFM) With 2.020" & 1.600" Valves

@.200" = 114

@.300" = 167

@.400" = 218

@.500" = 236

@.600" = 251

Exhaust

@.200" = 102

@.300" = 143

@.400" = 152

@.500" = 152

@.600" = 152