Canton Racing 22-595 install question

OBTW, we did the mod to the filter plate to drill 4 more holes and enlarge the 4 original ones a bit. Plus the fittings from the Canton adpater to which to couple the AN fittings, and the hose adapters to the remote filter mount, were all drilled out to enlarge them as much as we could. Everything to minimize pressure loss at each little step in the flow.

What size drill bit did you go up to??