NGK Plugs

[3macs1]

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Hmmmm... so what's an NGK 'R5671A-8'?? A buddy thinks they will fit the Deuce

Pretty sure that is one of their racing series plugs equivalent to a AC 41XL.Not sure what you are running in the car now to see what it would cross to.We run NGK in just about everything right down to the snowblowers and there is no comparision to running a AC at least in a BBC on the street. We were replacing AC every other day from fouling or just going dead. We don't see that in the BBC with the NGK.
Have to say that is a interesting plug Rick is running and I will have to do some checking since we call for the R43T also in one engine but run a 4323.Hope I got the right ones in.