my recommendation is a fmf powercore 4. fmf is a good company and i love my pipe. ive actually got one on my warrior and my 300ex and they both sound good. i know everyone on here recommends hmf and they are nice, but i dont have any experience with them so i cant speak on that. i will say to stay away from alba pipes though. they suck! there was one on my warrior when i got it and it blew some serious balls! i couldnt get the damn core out to change the packing because of the rivets they use to put the damn logo on it. also, they dont make their own pipes so they dont sell replacement parts for them, like spark arrestors, cores, etc. so basically, dont buy a pipe from alba. other stuff like bumpers or nerfs or basically anything that doesnt go into or on your engine is fine. i dont know about their motor kits, but after the pipe i wouldnt trust them unless they are parts made by companies with good reputations. anyway, thats my rant on alba and pipes. in conclusion, i would recommend either fmf or hmf. later