Purchased this item for my boat (sea ray 175 sport 3.0L). On initial install the Carb diameter hole was a bit to small so the flame arrestor would not fit onto the Carb flange. This was corrected with a Dremel tool, after a small bit of grinding it slid right into place. The next step was finding a threaded rod log enough so the arrestor could be secured to the carb, after a trip to NAPA (local auto supply store) that issue was also corrected. Finally fired the boat up yesterday on muffs and she purred like a kitten and looks good too. Cant give details on performance yet but I am hoping K&N claims are as accurate as they say. One suggestion I have is, I would like to see an all inclusive kit with everything needed to do the job for your application.