I just installed two Raptor mufflers about a month ago on my 51 with a 235 engine. I am pretty happy with them, sound and performance. Like someone said earlier, 2 inches is a little big for the engine, but with the amount of power its making, I think the difference is going to be minimal. They are a great price though. Figured anything was better than the previous owners system. One rusted out glasspack, cuts out mid chasis, and one huge modern muffler with a tailpipe exiting in the back. I was running straight pipes, awesome idle, full throttle was embarassing, making all kinds of noise, and hardly moving.
