to suit the vauxhall C20XE or C20LET these are 11mm O/D
these valve guides are precision machined made from genuine COLSIBRO material and shouldn't be mistaken for "bronze" guides
this is the best valve guide material on the market achieving less friction and heat transfer to the guide then the original cast iron material
if you do not have anyone to install these COLSIBRO guides we can do this in our very own machine shop, if you require this please message us or call on 01761 472524
many thanks ANDERSON RACING ENGINES
