okay, got mine yesterday, and put it on. took 2 minutes to install and it does come with a Spark arestor screen. Started it up and id does sound a bit better, still not like I think a V twin should sound, still a bit like a disel, but deffinitly better than the stock tip, not much louder. Any power increase, probably not, but it is worth the money for the improvement in sound.

Did you rip out the stock arrestor and inside tip before installing the aftermarket tip?
How big is the opening?

The stock arrester just unbolts and comes out as a unit, I keep mine with the Teryx or my tool kit just in case I need to have an approved arrester. Make sure you locktight the bolts, they will vibrate loose and fall off, trust me on this!

this tip has its own spark arrestor, only a screen but it is okay 99.9% of the time

I have a Billet Exhaust Tip for sale if anyone wants one.I do not need it anymore after I put the Gibson on.

what was your honest opinion on the gibson? More poer? how about the sound, is the disellike sputtering gone?

I didn't use the screen it looked very restrictive and i will change the tip up in the forests........