Originally Posted by 89BigBlock
Well after searching for parts online I've concluded 2 things.
2. There is A LOT of restriction on these systems.
The risers and fiberglass silencers have a ****-ton of exhaust flow obstacles and deflections. Wish I could get a decent pic for show and tell. One would think there is a fair amount of performance enhancement there. I'm wondering tho..what kind of back pressure, if any is needed?
I know exactly what your talkin about inside those mufflers. I was pretty shocked to see that as well. As far as back pressure.....who knows. My boat has been "open" for 4 years now with no probs. Power seems plentiful. Just my opinion.