Just want know what brand are the best for a silverado 5.3 i have now ngk tr55 but don't really like

 

What dont you like about them?

 

I run the iridium TR5IX in my Truck,,, In my car that had 11.8 compression I ran the TR6

FWIW the difference between tr5 and tr55 is the gap, the second 5 is just a preset gap

 

Ditto, what is troubling you about them? Is your truck misfiring, fouling plugs quickly, etc?

 

I have ran 55's on NA setups with good results.

 

just want know this is my first silverado with mods and that's way , yesterday i take the ngk and swap for a iridium ac delco and fell allot better, if one of u guys tell me what is the best for my setup i swap them right on, thanx for all the reply's