Description Holden v8 253, 308 6mm aluminum rocker cover spacers, these are ideal to give extra internal height when fitting roller rockers, require longer 1/4 unc studs or bolts and a gasket either side of the spacer. These Aussiespeed roller rocker spacers can be used with both alloy or tin covers and may require some additional trimming of the outer edge to fit the many variations of rocker covers available
