Originally Posted by
doyle hargraves
Billet or Brad could one of you guys explain the difference in msd boxes? We have been running the basic 6al box with the dial type rev limiter but a local track we run has announced that the only box legal for next year is the box with the plug in rpm chip. I believe it is 6aln? Was looking at the prices of them and see they are more expensive than the digital box which is not a huge deal but I always though they were old technology compared to the digital box. What gives??