I have a 29 scarab with twin 350 mpi's and there equipped with the corsa Q&Q but no captains call so non selectable. They automatically split and exit threw both the transom as well as the drive. I've heard that someone make a kit specially for this that blocks off lower exit and then gives you 100% true thru hull. IF anyone has any info on this it would be appreciated. I'm also probably going to change the tips since they appear to be an actual muffler. Thanks

Hello Bern: You might want to take a look at Corsa's website. I believe IMCO also makes the setup you're considering. I'm not making an endorsement of either. I believe a few other manufacturers make the same configuration.

Good Luck...ff1