How much Horse power?

How much horsepower is gained by using a super trapp exhaust on a stock 350X?

[ATCRYDER]

Little to None. piping a 4 stroke makes a differance but not 1 half as much as piping a 2 stroke. It also depends on how many discs you run with the trapp.

[200xer]

what's with people and HP numbers? HP numbers don't mean anything. You can have a lot of peak HP, but none at the lower RPMs so the bike won't pull out of corners or off the line. Don't be concerned with numbers.

Usually a freeier flowing exhaust will give more power on top end, but you could sacrifice on bottom. A more restrictive exhaust will give bottom end. Bigger carbs help more on top end. Cams can do either, depending on the lobes. Hope this helps.

[YTZ250N]

I have found that it almost always comes down to who has the more horsepower.