Trying to decide what to get, TR5s or TR55s. As far as I can tell the only difference is the gap on the plug. What do yall like to run for a gap and why? I know factory gap with iridiums is .040"

Truck in sig, basically stock.

 

Tr55 at .055" when I was NA.

 

My vote on the poll was with a TR6 in mind. I would recommend .050 gap.

 

do not many people run these plugs?

 

There are lots of threads on this, search around on here and you will answer most of your spark plug questions

 

I did search but most don't seem to post up the gap they're running.

 

If it is basically stock then I would run a stock heat range plug gapped to the stock specs.