[MB38]

Their signature exhaust is the best on the market, for $1,600. It seems like a bad price until you realize the work they put into it. Divorced wastegate dump, sure, that's not that hard. They calculated the thermal expansion of exhaust gasses based on the various temperatures at various points of the exhaust; the exhaust piping constantly changes size to fit the temperature perfectly. It is the lowest possible backpressure exhaust (that's legal for street use) based upon the thermal design. In other words, you could go to a muffler shop and get a $350 exhaust, even one with a bigger pipe, but it wouldn't be nearly as efficient.

Not knocking your idea, just explaining the price.