rear disc conversion

[k343ane]

on doing a rear disc conversion on a freinds corsa gsi wot bias valves do you use coz i got some for my nova but don't know wot to get them of as they where in a tub at my local vauxhall scrappy

[david dixon]

probably astra gte mate.

[Riggy]

iirc its the 4/30 bias valve