Originally Posted by RTBenny
How much is the Zex Truck kit? How big of a shot (if any) can you run without a tune. My last fast vehicle had spray but it also had a dyno tune. Not too sure on these new Dodges. Thanks.
Zex will officially say a shot 75 is safe with no other mods but you can surely run a 100 shot with Torco or a bit of race gas and will be fine too.....
I would also run 1 step cooler plugs
a 125 will requiring some timing pulled, typically its 4 degrees