the 7910 is a pound heavier than a 7900? where is the additional weight? I thought it was just a muffler difference between the 2?
the added improvements....A/V limiter, SLR added to the muffler, muffler brace that was added because of the heavier SLR muffler, a bit of fudging on the original numbers maybe. I cant think of any other changes that would add weight but the SLR muffler is quite a bit heavier than the standard muffler. the 6400 cat muffler is even heavier than the SLR muffler