I went to the local muffler shop, had 'em bend me a couple pipes, stuck a Thunder City "Thunder Boltz" baffle in there, and mounted them last night. Though in reality, there has been a couple months of R&D behind these, morphing out of an attempt to make some fish-tails for the bike (now they can just slip over these existing pipes if I want).
They don't hafta be this long, the baffle should be at least 3" to 6" from the outlet of the pipe. I'm going with this length for the time being.
My last pair were mounted in some D&D cans, about the same dimensions as these. 64.64 (SAE) hp to the rear wheel, good low-end but lacking up top...... and it's amazing how quiet they can be by finding that sweet spot where you're not accelerating. Sound pretty good too!
(danm, late for work.....)
