I've seen them bolted and screwed in. Most now days are bolted but than again with the sealant we have now days I would have to belive using adequate size screws would do just as well. The Corsa tips seem like they have a bolt pattern thats a little off than most tips but there's still a chance whatever he buys may line up with the existing holes. Maybe someone else will chine in as to a brand that worked.

I had my Corsa Mufflers swamped out in 2001 with no problem. I can't remember the brand of the new tip. Might have been Stainless Marine. I think I used the 6 inch tip. I also had the tabs added at the same time. Good Luck.

What motor are you running and how does it sound with those new tips? I am concerned with the water cops on Lake MI.

It sounds awesome. A deeper and louder more prowerful sound. I have the 454 Mag efi 385hp. I thought the Corsa mufflers were too quite when running and still a little too loud when in no wake zones and trying to hold a conversation. I also added Corsa Silent Choice at the same time and route it through the prop in no wake zones. So far I have been left alone in Grand Haven, MI.