Whats The Diff -rb30 1 Or 2?

[exXU1]

Is there and significant diff between series 1 and 2 , i know about the oil lines on a turbo block but is series 2 a stringer block or the same ?

[skybt1]

its the same block. The series one does not have the holes for the oil and water lines but the galleries are there. You need to drill and tap threads to use the galleries. Easier to just get a series 2 block.