I have Harley plugs now, but notice a bit of rust on outside after last wash. Anyone try e3 or any other brand?

 

I put NGK #3481s in my 2010 Wide Glide. It made a differance it revs faster and my *** dyno says more power lol. They are two steps hotter then stock and it pings a little under hard load but very little and it did with the stock plugs. I tried some octane booster 108 turbo and it stops the pinging and revs even faster and pulls harder and more responsive. I put half a bottle per tank its $9.00 a bottle at the Checker in town. I also notice MPG goes down a little when running the octane booster but only 3 or 4 and its worth it to me the bike still gets at least 40 even ridding hard.

 

tried SE, NGK, and stock and no difference. indexing gives the best results.
http://www.fordmuscle.com/archives/2...gs/index.shtml

 

I put SE triple platinum at about 5000 miles and still look great at 50k. keep my stock ones in the tool pouch.

 

Personal opinion but I would never consider going one step hotter let alone two. Might be the pinging problem. Many go one step colder particularly with a bit more compression.
NGK, Champion, Autolite are all fine. No need to spend money on the trick plugs.

 

http://www.harley-performance.com/ha...park-plug.html
I've heard good things about Autolite 4164, at least on carbed bikes. I'm going to get a set and try 'em on my EFI.

 

They'll work fine. About $1.49ea.

 

I have had the HD Gold in the bike since brand new. I am seeing a bit of rust and discoloration on them at 4500 miles. I put in E3 and immediately notice improved throttle response! Maybe it's all in my head!? But I could not get the plugs in their tightly enough. One fell out of my left ear!