I have a KKM & have really enjoyed it. I love the growl I get from the exhaust. I have had no problems so far & I have put 14k miles on it in 2 years+. However, I do think my next mod will be a K&N filter in place of the inverted cone filter on the KKM. Hope this answers your ?.

Black 99 CSVT #1820 of 2760 -Current Mods- DMD, KKM, Koni-Kit, HPP rear strut tower bar, metal water pump, tinted windows, Pioneer DEHP4600MP, 6x8 Pioneer 4ways