I have an 05 400ex with a full fmf exhaust. I want to upgrade to a looney tuned dual full system. anyone know if this is better then what i have one there now? and how much more power would i have?

 

they look good but i dont think you would get anything power wise out of it.....i have a yoshi on my 400 and love it

 

LTE add a lot of power to your 400 with it having 2 exhaust ports on the head it will rev faster with the more free flowing exhaust. I have one on my raptor and love it LTE claims it adds 13 hp to the raptor.

 

hummer93516 they look good and sound like you have more power , but that's all they do and your carb will need rejetting to keep the power you have with the stock exhaust ; even then with just the twin pipe's you're only going to sound louder and atract more attention to your quad !

But it's up to you , and it's your money so spend it on whatever you want if you want it to look cool ; but it's only a crossover pipe on a one cylinder engine !

To get more power you'll need some engine mods for any power gain's , the pipes aren't going to do it alone ; i've seen this and the cost will go up in a hurry for what little you'll gain !.......

 

buy a cam, hi-comp piston and save some money...
oh and re jet the carb to match the pipe. if you haven't already done so.