I have thru hull exhaust with no way to convert to silent choice( no y pipes) or use slip on tips (due to swim platform clearence). What choices are their for in line mufflers that will not restrict exhaust flow? Engines are stock 454 (330 hp)

Has anyone used Dapars with any luck?

I just ordered Gibson Turn downs thru Trick Marine.

I run these.
http://www.eddiemarine.com/cart/deta...CategoryID=144
I did a back to back test with and without and saw less than 100rpm loss on my 502Mag.
You will have no power loss with a 330.

I have a pair of inline Corsa's that install between the exhaust riser and transom that I am no longer using.

Thanks Pat looks good.

Thanks anyway 800. I will need four.

I used to have stock exhuast with slip in baffles in my 454 Mags. I took out the baffles to see if I gained anything. I lost 50 rpms with the baffles out and the sound was simply louder, not better. Seems like the stock engines like a little back presure.