Fits 429 and 460 ci engines (except BOSS 429)
Valve angles and locations designed to reduce cylinder wall shrouding and improve flow
Combustion chambers designed to accommodate the centrally located valves
Production 429 Cobra Jet intake and exhaust manifolds bolt on
Production Ford 429/460 valve cover bolt pattern
WR-6582-C460 Ford Racing Valve Covers recommended
2.200" intake valve, 1.76" exhaust valve
Flows approximately 330 CFM intake and 225 CFM exhaust
72cc combustion chambers
290cc intake runner, 148cc exhaust runner
Uses rocker arm part numbers WR-6564-A460
Assembled with WR-6513-A351 hydraulic roller valve springs: Closed seat pressure 135# @ 1.850"; Open seat pressure 365# @ 1.250"; Max lift .700"
Machined 7-degree locks and steel valve spring retainers, premium valve seals
Uses Motorcraft AGSP series spark plugs
NOTE: If replacing Ford Racing or production 429 Cobra Jet heads, new intake valve notches are required
NOTE: Uses Felpro® exhaust gasket part number 1420, and intake gasket part number 1231
