Spark plugs

[partmopar]

Any idea's on what spark plug I would need on a 11 to 1 499CI with Stage VI heads.
My first set of these heads. Thanks

 

[69Bee]

Start with an Autolite 85, and read the plug to see if you need to go to a colder plug. Hemi's use a 65, so you might have to lower the heat range with that compression.