I have a 2003 twin 496mag HO boat,was told they run better with a little back pressure,I have straight /empty tips on it now and need to replace them with Corsa muffler tips for noise reasons.

I was told they run better with back pressure from the mufflers,any truth to that, was anybody installed Corsa mufflers on a 496 mag HO ?and have you noticed any difference at all,good or bad?


Thanks

try something else.put some on my 496 HO (baja 272 2001)years a go lost about 10 MPHHHHHH???????and remove them the same day.i think i will try Hardin Marine Tomahawk Mufflers if they fit the transom just for the law.

You lost 10mph by putting on Corsa Mufflers?

Huh? I have always heard the opposite about back pressure.

I did just the opposite on my PQ...for noise reasons. Really woke up the HO's after removing the Corsa muffled tips. Didn't really notice much change at WOT, but mid range seemed better. Sounded like it anyway.

It won't run better with mufflers. Chances are you will see a slight loss at wot.