Ngk ur6 spark plug

[83 intercooled]

Ok I been using autolites 23 and had good success but looking to change the plug and looking to change the plug and was thinking about the ur6s car stay around 25 26 psi and looking to go higher will this plug be the same heat range as the autolite 23 thanks for the help

 

[TurboSlacker]

I've run NGK UR5 successfully up to 25psi boost. I'm curious as well if UR6 would be better same or worse.

Sent from my HTC One M9 using Tapatalk

 

[canadian nascar]

I have a different animal 81 301t but have ur6 right now to help, not sure if it is or not, just watching