Pop pop on exhaust side

I can get NGK 2238 in heat range 5.
It has the 5/8 socket for my headers.

So for the ease alone of not fighting the 13/16 between those pipes it's a good idea. My old 360 has NGK and it never had fouled plugs.

The champions everyone recommended the parts store wants me to order a case of 24 at a time from the US.