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.

 

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.

 

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

 

Iridiums will last alot longer.

 

Alright, thanks for the replies.

 

my iridiums work good for me