1982 Bertram Cat 3208 Exhaust

[franklyprice]

The problem is, unless someone here has that exact setup, nobody will tell you that it will for sure do the job. There are some variables, such as overall exhaust design. Generally speaking 5" will do it. The only sure way to know on your boat is to install them and do a back pressure check when you're done, at wide open throttle. I think that anyone who does repowers for a living will tell you pretty much the same thing. It wouldn't be a bad idea to join Boat Diesel.com and ask on the forum.It's well worth the $25.00