i need help on what spark plugs to use on my 94 z28. ive heard of NGK but not sure if they are a good plug. most autoparts store tell me to go with the originals. if any one could help me on this i would appreciate it.
What spark plugs do you suggest?

 

I use bosch 4's and I am very happy with them. I replaced the stock only because of their age. I can't say weather I noticed a difference in running, but they are holding out fine.

 

AC Delco works good for me

 

I've herd many horror stories about those bosch's. I'd go ac-delco or NGK TR-55's (what I run) some people talk bad about the NGK's too but I've had no problems to date with em...