i have a 96 suburban but has the newer 5.7 reman with the gm vortec cold air.... im getting ready to do a tune up on her and i normaly get the bosch-platinum-plus. but have talked to a few people and they say get an iridium plug out of the 4 im listing which one would be best for my older girl with a newer heart....

the reg bosch-platinum-plus, autolite-xp-iridium, bosch-iridium-fusion, or the ngk-standard-copper

thanks
nick

 

everything i do with fuel injection gets platnum plugs, for longevity and efficiency, if i have the extra cash i go with bosch platnum 4's

 

ac delco # 41-993. original equipment, platinum plug.