I see that lots of people are using the big gun exhaust system and seem to be very happy with it. I have a 2008HO and I emailed big gun to ask about jetting my carb after the install. (I'll need to look back at the email but it does need a new jet) Just recently I have been doing some more reading up on it and I see that you can use a spark arrester and a " noise reduction" that comes with the exhaust setup. Using the spark arrester and "noise reduction" they "big gun" say that I will not need to re jet but I will need to adjust my carb. Here is my thoughts on that. When I go riding and messing around with buddy's on the weekends I would love to have the full exhaust system purely for the sound and fun and I am willing to pay for that, then coming hunting season I can switch back to stock. I am just wondering if there is anyone out there with a 500HO with the full big gun system using the spark arrester and "noise reduction" and what if any adjustments they had to do??!