IMO, dont mess with any chips.
Spend the extra and Get an xcal3 programer from our sponsor, Torrie.
You can have your tunes writen to what you want. With life time service.
Torrie is excelent with what he does. He know what our motors and trans can & cant do.
Plus he helps keep our site membership free.
I have used both. Chips and programers in the past. The xcal has been the best.
http://www.mysporttrac.com/shared/sponsor.asp?SPONSORID=57