I tried one of his $250 "Y" pipes. The fabrication was one of the worst I've ever seen. Very thin metal, the welds were not cleaned up and the inlet to the TB was warped/ovaled from bad welding. Got my money back and his excuse was that the part got past QC and was not the norm. He doesn't have a favorable rep on the MB forums either. Way over-priced for the quality. But yes, he has the right idea.

Mercedes Benz AMG Performance Parts AMG Performance Packages