Fits and works amazingly on my 2012 4003FG and cannot tell any difference from the front. I actually cannot believe how well it works. I've used HS Xtenders for years on my Fenders and always seemed to stubble with calibration and the E returning sharp caveat. I used to have to spend like 5 minutes recalibrating before gigs/rehearsal. The BT5 is like a rock. Highly recommended... as long as it will fit your model year.