Does anyone know why APR recomends getting their exhaust upgrade if you are going to get the Stage 1+ software?

so they make more money? i got both on mine and enjoy every penny spent.

yea, but does anyone know if not getting the exhaust with the stage1+ will cause any damage or cause problems?

It shouldn't. I had the chip for 3 months before they came out with the exhaust.

just puts more of a hp gap between 1 and 1+, so they can actually call it a stage...