Apparently MSD has two filters available one for the positive voltage and one for ground.
I've never used either one, but this seems to be a pretty good write up on it
Information
http://www.centuryperformance.com/mallory/unitest.asp
surge suppressors or Filters
http://www.centuryperformance.com/de...ct_id=MAL-611M
http://www.centuryperformance.com/de...t_ID=MAL-29351
Thanks for your imput, I think I will wait to here from msd on the first box and why it died before I go buyin more stuff.