A long time, like around 2 years ago, I bought a Vetterman crossover (for Superior sump) exhaust system from another builder as surplus for my plane. It's survived a divorce and hangar move, gathered a lot of dust, and been mostly ignored since that time. I bought this exhaust before I even had the sump, long before I had the engine - I just knew that's what I wanted to end up with and I picked it up when I had the chance.
Last night I pulled it out, and bolted it up on my engine - took about 45 minutes and it slipped together like it belonged there. Quality and fit are top notch, kudos to Vetterman for a good system. He even includes gaskets and nuts/washers in the kit - first class.

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Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX
VAF 2020 dues paid 
N16GN flying 700 hrs and counting; IO360, SDS, WWRV200, Dynon HDX, 430W
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now.