has anyone tryed other spark plugs in there 96 c.i. dyna. Iv heard the Harley slit fires work well

 

The general consensus seems to be that splitfires are expensivesnake oil.
Nothing wrong with standard plugs imho. I've used NGK, Autolite and Champion with equal success.

 

I run the Screaming Eagle split fires. It's like motor oils & tires - everyone has their own likes. Yhey aren't that expensive, give 'em a try.

 

Has anyoneused the HD Gold plugs?

 

Thousands of miles here on plain jane HD plugs, change them every year, no problems yet.