I have a perrin cat back exhaust with a perrin drop in filter. My Cobb AP isnt supported on my 2009 Evo X for some reason so im waiting for cobb to get it integrated. Is it bad to be running with the CBE and Drop in without a tune or flash? Im not sure when cobb will get everything working for the 2009 evo x (canadian model) I dont want to mess anything up until then. About a week ago for about a day when i started the car it idled low and stalled about 3 diff times throughout the day. Since then it hasnt happened again. Not sure if that was the mods without tune or not. But its not happening anymore. Should i be ok for awhile with these mods? Or should i be worried?


EDIT: There is also black soot all over the inside of both exhaust tips.

 

your fine with just those mods.

 

Thanks, I will be able to feel at ease until the re flash