Ditto on the 1-7/8ID-2"OD pipes. No sense of dumping your low-end torque. As for the FlowMasters.....don't think they make them down that small. I had a pair of 40's that I reduced down to work on the 2"OD pipes. Didn't like the tinny sound so went back to the Cherry bomb glass packs. Nice and mellow up to 2300 and then they make that unforgetable inline 6 "chaingun" sound...no crossover.
Dave