MCDONNELL & MILLER
MCDONNELL & MILLER 4000 Xylem- 51-HD HEAD MECH. FOR #51 #134900
HEAD MECH. FOR #51 #134900McDonnell & Miller 4000 Xylem- 51-HD Head Mechanism with NEW HCY Unloader.The 4000 4 valve cylinder heads are a smaller bore unit for a 4.250" piston. Many of the...