I installed a set of Holeshot headers made by Dale Walker (www.holeshot.com) on a friend's K9 Bandit. Also installed a TFI, K and N, removed the airbox back, removed the secondaries to make it a stage III setup. The headers are a lot lighter than standard and a lovely piece of kit. Great welds and a perfect fit. He has the factory lower fairing and a bit of surgery may be needed there as the headers come out further than stock. He's also got a Racefit Growler fitted. The bike makes a deep growl now! He's a very happy camper. (And he had it dynoed and it gave 130.8 hp and was very happy)