I keep having misfiring issues in my lq9 camaro. I am currently using ngk tr5ix plugs but i have to change them like once a month. I have a street sweeper cam, ported ls6 intake and tb, hooker headers, full exhaust and slp air box and under drive pulleys. I guess my question is do I need to be running ngk tr6 plugs?

 

A tr6 would be a better choice

 

I've always used ngk tr55 plugs... There good for a all motor set up. Unless your planning on squeezing on the motor.

 

Thanks, I think I am going to try the tr6's this time. What should I gap them at?

 

When i used to run them they were gapped at 40