FYI: B10EGV plugs from Advanced Auto comes with a 1 year warranty.

I've also taken advantage of this.

 

I know this thread is old as dirt! But does anyone know if they still have this warrantee? Yes, I'm a cheap basturd!

Also, what Plugs are best to use for 500hp application in the leadings? I tried the B10EGV plugs that Lupe used above and apparently according to MSD Rotary Tech guy....this plug likes to preignite the combustion chamber due to the "V" gap in the plug. I ended up getting knock of 145 on my commander with those plugs!

 

Made made around 530 with the B10EGV and have a few friends making 500 with them as well.

And yes, they still are warrantied for 1 year.

 

wow you can get the 10's though them as well? guess ill be switching the trailing to 10's the next plug change..

 

I know where to get oil that has a 3 month warranty too, only thing is its formula shell, and only in a 5 quart container.