Hey guy's my boat has twin 350 mags with stock Merc. exhaust ,would it be worth putting on say CMI or Stainlees exhaust,will i gain any substansual hp increase, any reply is helpful,,,,,thanks
Hey guy's my boat has twin 350 mags with stock Merc. exhaust ,would it be worth putting on say CMI or Stainlees exhaust,will i gain any substansual hp increase, any reply is helpful,,,,,thanks