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CAST AND MACHINED IN THE USA

COMPLETELY REDESIGNED PORTS AND CHAMBER

ACCEPTS EXISTING INTAKES,  EXHAUST AND VALVE COVERS

SPECIFICATIONS FOR Y-BLOCK ALUMINUM CYLINDERHEADS

VALVE SIZES: 1.94" intake     1.54" exhaust   11/32" stem

VALVE MATERIAL: Stainless steel, hard chrome stems, hardened tip.

VALVE LENGTHS:  5.110"

VALVE SPRINGS: Single spring with damper, 1.250" diameter, installed height 1.750".

110# Seat @ 1.750"    280# @ .500"   Seat pressure 85# with +.050" keepers.

VALVE GUIDES: Manganese Bronze alloy

STEM SEALS: Positive type

STEEL SPRING CUPS. 1.375" OD

Heads cut for 1.460" OD spring cups or discs

Hardened keepers with 1 piece steel retainers.

VALVE ANGLE: 18

COMBUSTION CHAMBER:  60cc +-

SPARK PLUG: 14MM X " reach

BARE MACHINED CASTING WEIGHT:   24.5#

DECK THICKNESS:  .625"

INTAKE AIR FLOW: 235CFM @ .550" lift 28" water column

EXHAUST AIR FLOW: 175CFM @ .550" lift 28" water column

OEM INTAKE FLANGE PATTERN. Accepts existing intake manifolds.

OEM EXHAUST FLANGE PATTERN. Accepts existing exhaust.

OEM VALVE COVER RAIL. Accepts existing valve covers.

ROCKER ASSEMBLIES NOT INCLUDED.

PRICE     2250.00 PAIR   COMPLETE ASSEMBLIES

JOHN MUMMERT

14368 OLDE HIGHWAY 80 Suite C

EL CAJON, CA 92021

(619) 596-0312