has anyone installed this? does it give you anymore horsepower?

 

Interesting way to phrase the question. I think the answer would be no even though all the hp is now going to 2 wheels instead of 4. However a perceived "feel" in power increase might be noted because the atv will act very different in 2wd vs. 4wd. Mine gets down right squirrelly on the trail in 2wd. But I can kick it sideways if I feel the urge.