04sierra

I am going to be replacing my spark plugs soon and will be replacing them with a set of NGK's. I figured out that I need the TR55's since I am N/A but what's the diff between the regular 55's and the iridium 55's? Besides $4.00 a plug.

slamed 04 silverado

The TR55's are a good plug. And i hear that the iridium ones are better. Me personaly would just stick with the OM plugs.

04BlackGmc

iTrader: (18)

Yea stock plugs are just fine im sure, but iridium's will last longer.

slamed 04 silverado

Iridiums will last alot longer.

04sierra

Alright, thanks for the replies.

Whistlin00

iTrader: (1)

my iridiums work good for me