ok here is some filter numbers from my k&n catalog for people wanting to diy there bak/vbak and lcv and cc breathers.
for lcv/cc k&n #62-1000 2"od x 1-1/2"h 3/8" nipple fits inside 3/8" hose.
here is a few air filter options:
1-3/4"id x 3"base x 2"top x 2-1/2filter length part #ru2690
1-7/8"id x 3"base x 2"top x 2"filter length part #rc2550
1-7/8"id x 3"base x 2"top x 3"filter length part #rc1090
1-7/8"id x 3"base x 2"top x 3-11/16filter length part #rc1290 (this filter has a 10 degree angled flange this is the filter used by the king of all vbak's)
2"id x 3-1/8base x 2"top x 3"filter length part #rc2580
these are the sizes that i thought would work in most all cases they have alot of other sizes available. these are all tapered filters with 5/8" flange length (where the clamp goes) except the rc1290 which has a 1"flange due to the angle.
i hope this will help some of us out with what filter to use questions[
]. oh ya the ru part #s are rubber end caps, the rc part #s have chrome end caps.