Autolite XS4063 Xtreme Sport Iridium Enhanced Spark Plug

[av8er]

anyone use these plugs?? they are an exact replacement for the M8, plus Iridium.
the NGK Iridiums are about $2 more each.

 

[RACINSTATION]

Just run a BR9EYA in naturally aspirated and BR10EYA in turbo Cats.

 

[BigAir]

Is this true for M1000s as well as M8s?

 

[RACINSTATION]

Yes.

 

[Clutchweight]

I've been running Autolites for a few years now. The XS 4062 is equivalent to NGK BR9's. They produce 2.5 to 3 HP more than a BR9ES or and EYA. They are hard to read without cutting the thread off and looking for the ring on the porcelain. Many racers use them.