Ford Racing - 302/351w "z-head" Aluminum - Assembled 63cc - M-6049-Z304DA

Fits 302/351 Windsor engines.

Cast from prime A356 T6 aluminum.

Heads are cast with high-flow ports.

20 degree inline valves.

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

Uses PAC 1219X conical style valve springs with machined retainers and machined valve locks. Most hydraulic cams can be used with these springs.

Valve spring closed pressure - 145 lbs. @1.800".

Valve spring open pressure - 358 lbs. @ 1.175".

Includes laser cut guide plates M-6566-Z304D for use with 5/16" pushrods and 7/16" rocker studs (Rocker Stud PN is ARP DRP154).

Steel alloy intake and exhaust valve seats.

Manganese-bronze valve guides

63cc CNC'd combustion chamber.

Intake port volume as cast: 204cc.

Exhaust port volume as cast: 85cc.

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

Requires 1.65:1 or 1.5:1 ratio roller rocker arms with .150" offset intake pushrod cup (not included).

Raised exhaust port exit, custom headers may be required.

Ford Performance M-9439-A50 intake manifold gasket recommended.

Uses Felpro® exhaust gasket part number 1487

Felpro® VS13264T valve cover gasket recommended.

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