I have had custom pipes made for a motorbike enigne - $1100

There are a few options, i priced out a bunch of burns stainless stuff for a new set, and that was looking at almost $1000 for material - this was at the start of the year when the AU$ wasnt as good. This is using much smaller dimaters though (1.25" primaries, 1.5" secondaries, 2" for the rest) and long ish lengths for a bike engine.

Where you going to build them yourself? or pay a place to make them?