[socket17]

yes climb it will fit a 2 inch sparky.

if you take a 1 inch tube and cram air through it and then move up to a 1.5 inch out let your still only can have the volume of air going through that 1 inch as going through the 1.5 it will just be less velocity. which yes may effect some back pressure.. but you must take into account on the end of a fmf sst pipe the back cone reduces down to a 3/4 od tube.. and there silencer made just for the sst has a 1 inch od mid pipe..

i run one of my banshee with pro circuit pipes and im still pulling wheelies down the road in 4th and 5th gear.. but that must just be the port job 370 laid down for me.