any advice on the better pipe, the yoshimura vs. the titanium 4(FMF)?

I don't know about those two. But I heard a guy with the alba pipe and it sounded impressive. He said it was $450 with the complete pipe and jet kit, k&N with adapter plate.

Curtis Sparks Racing...put one on and I love the way it performs. No part of the powerband is lacking. Steady pull from top to bottom, no problem pulling olds 3rd gear from just out of the whoops all the way up.

thanks for the input. SUPER WILL does the curtis sparks have a spark arrestor and can you tune it???

As far as I know, it's not tunable, but I could be wrong. Will have to check on the spark arrestor fact, it's not close enough to just check and see. Someone else may know, but I won't say yes or no until I know for sure. Sorry I couldn't help more.

thanks for the help. every little bit counts. Trying to research the system

You can also check out: http://www.yfzcentral.com/

I've been on the website. It rocks. All about the YFZ 450.