I have a Blackwing on my ZO6 right now and am considering going to stock but don't want to lose alot of horse power. I have heard of good gains with the Zip-Tie Mod but is it really all that good? It looks like you could get alot of dirt sucked in the engine that way. What can I expect if I go back to completely stock(minus the paper filter) and use a K&N or a Air Hog? Thoughts/Comments? Thanks!:thumb: