I read on the mikuni site that the ideal over all pipes should be 28"-32" of 1 3/4" header with a short (12" -19") open tip. Sound right? What is the scoop on the "new" (we did it with car headers 20 years ago) step design where they step from 1 3/4 to 1 7/8 to 2 1/2? Does this eliminate the need for a restrictor/ reducer? Any one know? I'm thinking of building a custom set of pipes.
