Good morning, I am looking to replace my 3227's mufflers/exhausts? I put a question mark because I am not sure if they are mufflers or just echo chambers! They are approximately 30 inches long, 10-12 inches wide black plastic that run from the riser hoses to the muffler out the rear outlet pipe. Searching on line, I can't seem to find a similar replacement, the only thing I can find is the Centek vernalift mufflers. But those seem to be for boats with mufflers below the waterline. Mine are at or just above the waterline. Any and all info, as always is greatly appreciated.