Proflow Cylinder Heads, SuperMax 335, Aluminium, BB Chevrolet, Bare, 120cc Chamb grommet they come in 2 different

they come in 2 different finishes

Seat Mounting hole size: One end 18w x 10h mm

FIRST DESIGN CYLINDER HEAD

Blue + Black Motor 308 Logo Embossed with 1 hole 1-1/4" for Breather or Pcv

If your installing a new distributor you will need one of these Billet Hold-Down Clamps from Proflow

Proflow Cylinder Heads, SuperMax 335, Aluminium, BB Chevrolet, Bare, 120cc Chamb grommet they come in 2 differentPart Number : PFEAHBB335121 BARE Proflow Cylinder Heads, SuperMax 335, Aluminium, BB Chevrolet, Bare Proflow does not sacrifice quality for a low price you get both with our aluminium cylinder heads. The lightweight heads are cast from A 356 aluminium alloy with a large choice of engine, for SB & BB Chevrolet, LS Chev Holden Ford SB 289 351W, 302, 351 Cleveland 2V & 3V & BB FE, and Chrysler SB & BB. They have phosphorous bronze valve guides, and