so i picked up a new to me 2000 gs400 2 weeks ago and i wanted to change the exhaust. i ordered a borla muffler and 1 magnaflow cat. i had these installed last friday and when coming home from work yesterday i got the abs off, vsc, and vsc off lights on my dash. i did a lil research and think i found this is telling me i got a code i need to get checked out. if this is the case could the problem because i either didnt upgrade the pipe size when i had the cat installed and/or cause i only changed 1 cat and im not getting the same amout of exhaust blowing through both pipes?