A priest and a rabbi operated a church and a synagogue
across the street from each other. Since their schedules
intertwined, they decided to go in together to buy a car.
So they did. They drove it home and parked it in the
street between their establishments. 

A few minutes later, the rabbi looked out and saw the
priest sprinkling water on their new car. It didn't need
a wash, so he ran out and asked the priest what he was
doing. "I'm blessing it" the priest replied.

The rabbi replied "Oh," then he ran back into the synagogue.
He reappeared a few minutes later with a hack saw, ran to the
car and cut off the last 2 inches of the tailpipe.