i have an 01 lightning and i am getting a 4# pulley but i have already bought my plugs(ngk tr6) and i have just sent my chip back for the reburn and i was just wondering if it would be alright to go ahead and install the plugs and what they need to be gapped at.

 

Sure put them in, and gap them at .40

 

I use the TR6's with my 4#...I also have a 6#(interchangeable), so I figured it would be best to have the safer plugs in for both pulleys....much better than deciding I wanted to run the 6# and then have to change the plugs as well or just chance it with TR5's .

--wes

 

thanks for the help. and hey don congrats on the 11 second run.