Is it right that the leading and trailing spark plugs are the same? Unlike an SA?
Thanks,
hanman

 

If you are using the stock NGK's then both the leading and trailing plugs are the same. If you opt to use the second gen plugs then the Leading and the trailing will be different.

Yes, you can use the second gen plugs on a first gen. I have been using them on my 82 GSL for over three years now. I use the platinum tips..Works great, last longer., go figure....


Fit perfect.....

 

I use 2nd gen plugs too, and I was thinking of switching to the platinums next time. You think they're worth it Jose?