You can tell left and right 1.9 intake runners by the twin studs on the
left  side  ones and single stud on the right side ones.

on the 2.1 ..the left side has no studs, and the rightside one stud.

I spend a lot of time sorting though all my parts ..
and seeing what fits what . I have like 20 engines , probably a dozen
waterboxers.
Need a core ?   lol.

scott

On 2/10/2013 5:42 PM, J Stewart wrote:
> You weren't trying to put a left intake runner onto the right side , or vice versa were you ? Now THAT is a distinct possibility that I had not considered ! Too many parts floating around out in the garage, and working on it 30 minutes here, an hour there, days apart-that may be it!    Thanks Scott!   Jeff Stewart ----- Original Message -----
>