It has Bypass Provision
This adjustable proportioning block serves several purposes which dramatically reduces the amount of fittings needed and reduces the potential for leaks
4mm Adjuster Thread Depth
The handle and ends are made from 6061-T6 aluminium then hand polished and chrome plated
LB9 HOLDEN V8 304 INJECTED 5
Proflow Cylinder Heads, SuperMax 360 , Aluminium, Assembled 120cc Chamber, Strai Fuel Delivery It has Bypass ProvisionPart Number : Proflow Cylinder Heads, SuperMax 360, Aluminium, BB Chevrolet, Assembled 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 ductile iron valve