Which plug would you guys use ? NGK 4306 copper V-power or the NGK 6509 1 step colder non projected tip iridium. This is for a 6lb 6.1 car . Thanks Robert E.

I don't know about the 6509. But I went with the NGK 2315 on my SRT. They are iridium and one step colder than stock.

Hey Rob Happy Hollidays my friend!!! Rob I'm running the NGK 4306's in mine which is what Kenne Bell calls for but you can either go with regapping your stock plugs to .035" which is also recommended by Kenne Bell or use any type of plug as long as it's one heat range colder but being that your factory plugs have that low of mileage I would save the cash and regap them but depending on your blower type. I know the Kenne Bells like the 4306's and run well with the irridiums as well!!! Gimme a call sometime and let me know which blower you ended up going with. Stay safe and have a great New Years Eve!!!