I need the pipe with the most increase in power, sound and spark arrestor dont matter. I was thinking ct, sparks, white brothers, big gun, alien, or yoshi.

 

weight doesnt matter either

 

Deciding on a pipe is really a personal preference, I would say white bros, fmf, or Yoshi, but unless your going to put on a headpipe, rejet and a K&N air filter, your pretty much wasting your money just for some noise, because by adding just a slipon u gain noise, which many think that is power, but the actual increase is very minimal.

 

Ditto that!

 

I would go with a yoshimura if I were you my friend used to have a z400 and it worked great on his bike.

 

If you want to try something new out, I just started selling a new Complete Exhaust System for $229. Cloned after the HMF and Alba pipes. Pretty loud and great power gains. Will have quiet cores and spark arrestors soon. The alba and HMF ones will fit in them. I just put a system on my DVX400. Havent taken it out to the desert yet, but it sounds awesome and feels like a lot more power just riding around here. I just started selling them on ebay and have had a ton of interest. You wont find a full exhaust system anywhere for the price. Let me know if you are interested.

 

Do you have any dyno charts?