am i obliged to drill the air box if i instal the k&n air filter # ha6002 ?
if yes, does someone as a picture showing the number and size of the holes
if no, do i have to do something else ?
for information, i use a leovince 4road exhaust without db killer (what a loud noise !
) + k&n oil filter # kn204 + spark plugs denso iuh24 (iridium)
thank you for your replies and advises
marc from france