Which plug would you guys run with my set up ? Mods are in sig and i don't spray the car much at all....
AC Delco 44lts- stock heat range plug
Ac Delco 42lts-2 heat ranges below stock
NGK TR6
All plugs are copper core.......

Thanks Chris

 

Anybody

 

I've had good luck with my NGK TR6 plugs.

 

Of that group I like the TR6(1/2 step colder than stock).....presonally I like the Autolite 103(2 steps colder than stock ) for the 150 shot.

 

I would go with Autolite 104's

 

Thanks guys for the input