Does anyone know the I.D. of the inlet pipe on D&D slip-ons?? I'm assuming they're all the same from model to model--just different mid pipes of course. I have Two Brothers mid pipes (2" O.D.) wth M4 slip-ons and I'm looking for some different cans. I was hoping the D&D would slip right on without the use of an exhaust adapter/reducer. I'm watching ebay for any used/cheap ones that come in pairs (VTR,Z1000,SV1000,etc..). I plan on keeping my current mid pipes and hangers to keep the cost down. D&D owners, feel free to pull a can off to measure--I won't mind one bit. Thanks for any info that can be passed along.