Ok last night on the way home from the track doing around 75mph i went to punch it, it down shifted and boosted up and i felt it like stumble once in like 3rd gear is this due to the cold weather or is it do to having a 4# pulley and CAI and not having a predator or chip. It was running good at the track.It only did this like twice from 80 but havent felt it yet again.

 

What kind of plugs are you running?

 

You aren't running any brand of chip with this combination? That may be part of your problem... blown plug may also be the problem.

 

Just replaced the plugs 3 weeks ago..Running tr6 plugs

 

You're asking for trouble running a 4#er with no chip. What were you thinking ?