I have had good luck with PSI and CPR pipes. I like the CPR pipes more and Jeff is more helpfull, lot of room to make more hp with Jeffs pipes. Send an email and see what you think. Also I don't care for open K&N's for trail, I make sure the stock air box will flow then seal it and make sure it only pulls cold air from out side the engine bay. I also vent the float bowls to the air box. But that's just the way I like to do it..
I too highly recommend PSI's setup. The modblaster pipe/silencer combo is great along with the clutch setup. The pipes aren't anywhere near as loud as I though they would be. I would say just a couple decibals louder than stock but have a mean growl that turns into a scream the more you give her.
D&D is also supposed to have a pretty good setup, but I haven't tried theirs personaly....
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