Now that I finally have a catback on my car (slp loudmouth) I was wondering if I should tweak some settings in the Predator's stock performance tune. The only airflow mods I have done are the catback and a K&N drop in filter with removed silencer. Maybe richen up a tiny bit?
Best thing to do is advance the timing as far as it will go on the handheld. If it pings back it down some. You should not have a problem. My runs great.