I have seen that everyone that is running with mods put the NGK TR55's in. What is so much better about this plug over other brands? Also I was wondering if you guys are taking the heat shield off or are you leaving it on. I want to change my plugs but I need to know why the TR 55's are better. I have the 5.3 SCSB, Z71,mods include K&N Filter Charger Kit, HPP3, Throttle Body Spacer, EGR Mod, Gibson shorties, customs exhaust, and posi 3.73. Thanks for the help.

 

dont know much about that but nice truck

 

They are just a good inexpensive plug. I leave my heat shields on.

 

well to tell you the truth i have tried all kinds of plugs. and i always come back to ngk

 

I have always had better luck with NGK's. Most are running the TR55ix's which are iridium plugs. They'll last longer and fire better supposedly than the reg NGK's.