New 400EX

[SMicah]

I just purchased my first quad a 400EX. It is a 2007 400EX barely ridden and has been checked out by my local mechanic.

My question is I want to upgrade this over time. I am going to upgrade the suspension first but I am looking at also getting a new exhaust.

Hands down what is the best exhaust out there. I don't care out looks or sound. Which exhaust will give me the most power? I am going to re-jet and also upgrade the airbox at the same time so take that into account also.

Thanks in advance!!

[shortbus5]

I have the hmf full exhaust with spark arrestor. The pipe sounds great and performs well. The power is there i love it!

[TRXRacer1]

I recently was engaged in this topic too. There's some really good info in this place I just wish I had a way to look it up for you. :(



Man it's too early for cabin fever.

[tri5ron]

Originally posted by TRXRacer1
I recently was engaged in this topic too. There's some really good info in this place I just wish I had a way to look it up for you. :(

Man it's too early for cabin fever.
:devious: :D

[bkelley]

Here's some of the most popular exhaust threads:

http://www.exriders.com/vbb/showthread.php?s=&threadid=313010&highlight=exhaust - Exhaust Thread!! Show your baby's breather!

http://www.exriders.com/vbb/showthread.php?s=&threadid=412487&highlight=exhaust - What's the best exhaust for a 400ex??

http://www.exriders.com/vbb/showthread.php?s=&threadid=336373&highlight=exhaust - WHICH 400ex Exhaust is biggest POWER gains

Pretty much any exhaust is going to let the engine breathe substantially better than your stock exhaust and unlock about the same power. What you're going to want to look at is the quality of the exhaust. I think HMF makes one of the best bang for your buck pipes. Looks good, sounds great, good quality. If you want top race quality you can look into Curtis Sparks, Pro Circuit, Alba, et cetera.