Mercruiser Hi-Po mufflers

[rickf]

I have a set of brand new old stock Mercruiser high performance mufflers. These things look like a cast iron rectangular box with one removable end. 4" in and out. Since they are starting to crack down on open exhaust I have to do something. I look at the prices on mufflers and I have to wonder, Are these any good? They were used on go fast boats in the eighties but I did not have mine then. Can anyone tell me if they are a good choice or not?

Rick

[yottyboy]

They should be OK. As you have probably found, there are several options for mufflers out there. They all do the same thing which is to baffle the exhaust flow thereby reducing noise. Cast iron ones should be highly effective. Mufflers also come in rubber, stainless steel, fiberglass, and rotomolded plastic. Just be sure to firmly clamp the hoses with t bolt clamps and use good quality exhaust hose like Shields Flex.