FORD RACING PERFORMANCE PARTS"Z" ALUMINUM HEAD

BARE HEAD FEATURES

This cylinder head was designed using Solid Modeling Technology

Cast from prime A356 T6 aluminum

Fits 5.0L/5.8L Windsor engines

Heads are cast with high-flow ports

20 degree inline valves

Suggested valve sizes: 2.02" intake and 1.60" exhaust

Requires competition valve job and bowl blending

Steel alloy intake and exhaust valve seats installed (no valve job)

Manganese-bronze valve guides installed with semi-finished ID

63cc CNC'd combustion chamber

Intake port volume as cast: 204cc

Exhaust port volume as cast: 85cc

Bare head weighs 27 lbs.

Accepts both tapered seat and gasket style 14mm spark plugs
(Motorcraft AGSP-32-PP, Autolite 3924, 3925)

Requires guide plate M-6566-Z304D (not included)

Requires 7/16" screw-in studs (not included)

Requires M-6564-F351 roller rocker arms (not included)

Uses M-6505-B304 exhaust valve and
M-6507-A304 intake valve (not included)

Raised exhaust port exit, custom headers
may be required

ASSEMBLED HEAD FEATURES

Premium stainless steel 2.02" intake M-6507-A304 and 1.60"
M-6505-B304 exhaust valves

Uses M-6513-BH Beehive style valve springs with machined
retainers and machined valve locks.
Most hydraulic cams can be used with these springs.
130lbs @ 1.800", 293 lbs. @ 1.200" and CB @ 1.085"

Includes laser cut guide plates M-6566-Z304D for use with 5/16"
pushrods and 7/16" rocker studs

Requires M-6564-F351 roller rocker arms (not included)

Check piston to valve clearance including radial valve clearance
before installing these cylinder heads on your engine

Cork valve cover gasket recommended

TYPICAL AIRFLOW (@ 28" OF H2O DEPRESSION) WITH 2.02 INTAKE VALVE,
1.60 EXHAUST VALVE AND COMPETITION VALVE JOB

INTAKE FLOW EXHAUST FLOW

LIFT AS CAST CNC AS CAST CNC

.050           31.1         30.5                  26.4                   34.4
.100           64.6         61.0                  55.8               68.7
.150         103.0         85.7                  84.6                108.7
.200         135.3         110.4                 113.3                 148.7
.250         167.0         134.6                 146.8                 187.0
.300         199.0         158.8                 171.6                 225.3
.350         227.2         175.2                 190.2                 251.7
.400         245.2         191.7                 200.4                 278.1
.450         259.8         206.6                 207.2                 296.1
.500         271.9         221.5                 212.8                 314.1
.550       277.3         227.7                 218.1                 319.7