I installed Bosch plugs once, after I was informed that was likely the reason my coil pack burned out (which caused misfiring, which destroyed my cat con and completely carbonated my entire exhaust system causing me many problems, problems I'm still dealing with even though this happened over a year ago), I stuck with ACDelco all the way, no problems with my replacement coil pack since. (except the carbonated exhaust system)
Old Car: Chevy Cobalt 2006 LS Sedan base (Automatic)
New Car: Chevy Impala 2011 LT Fully Loaded (Automatic)
Last edited by johnccc; 04-04-2012 at 09:38 PM.