I'd buy Muzzy. They have been with kawasaki for years and they know how to build an exhaust. Dragonfire racing has a system too. They run teryx's in the baja races and they kick butt! They got some cool stuff for the teryx. Youtube has some vids of them racing and stuff. There is a nice one of them doin a donut burn off in the parking lot haha. Now thats sum power!
2005 Brute Force 750, Big Gun full exhaust, ITP SS108 12" Rims, 27" Mudlites, K&N
Pro Armor Skids, Custom Advanced Timing,
3000lb winch on recievers front and rear, Rejetted
Over 322hrs of hard life and counting!