need help on dr.d and trinity pipes

[saud alzaabi]

ok i have a stock 400ex an i want to get a pipe for it how does the DR.D exhaust reply to a stock 400 ex does it give great power will i be able to be faster than a stock Z400 ?
is it great for wheelies ?


and same quastion goes to the trinity stage four exhaust

[nosliw]

you'll notice a good gain over stock if you jet it right and maybe add a k&n or uni filter, too. this wont make your top speed any higher though. you might beat a z, some people say that it requires more, but it really depends on the rider. if your good then a stock ex should not be beaten too badly by a z.