Spark plug Champion or Autolite

Good old standard Autolite Coppers work just as well as anything on the market, as long as you replace them every few thousand miles. At $.99 a piece, you can't beat 'em.

the plugs are autolite platinums AP3924. the wires are the blue ignitors from techtonics. the rest of the ignition is stock. do i regap the plugs, or should i leave them where they are now. i'm leaning towards leave them since it ran fine before and i don't want to deal with a no start issue when i start it or the first time with the new cam.

I use Autolite plugs plat 1 cheepos that get me 400 miles per tank and seem to handle continuous high rpm output ( drove across the US in four days)

Now I'm running autolites one range colder than stock at .028 and they run great...

i put in some 3922s and i can hear it misfire when its idling, but it seems fine when im giving it gas.

Champion plugs are barely adequate for a lawnmower...

Champions are crap.

Throw them away, they're shit plugs. Autolite just didn't crack the code for making quality iridium plugs at a super cheap price. I wouldn't even put these in my lawn mower.

Don't buy Autolite spark plugs. They suck. I had 2 out of 4 in a pack that were faulty and failed within days of installing them.

When we got our 535xi one of the first things I did was visit the local parts place to buy new spark plugs for the N54. After driving the car a while and visiting many BMW discussion boards I learned most folks have a very low opinion of them