I talked to Vetterman and discovered that the exhaust I have is for a Superior Sump, but I have a Lycoming. So I called Van's (assuming they goofed and sent me the wrong one), only to learn that I had ordered the FWF kit for a superior engine. Oh yea, I remember now, I was thinking of buying a Superior engine, but later changed my mind. Oops

Anyway, all is forgiven. I'm sending my exhaust back to Van's in exchange for the correct one (happy to pay the shipping).
Bill Rambo
RV-7A