3 inch exhaust big enough?

[markmark1121980]

I have a wellcraft boat with a 5.7 mercruiser and am wanting to put exhaust on it. Will 3 inch pipe be good or do i need 4 inch

 

[Bondo]

Re: 3 inch exhaust big enough?

Ayuh,... 4" is pretty much the Standard for Thru-hulls nowadays...

 

[swordfish25]

Re: 3 inch exhaust big enough?

The standard is 3 inch for the 350s. They use 4 on the big blocks.

 

[wca_tim]

Re: 3 inch exhaust big enough?

I gotta agree with Bond-O, most of what i see is pretty much 4"... including my own smallblock. For one thing, the vast majority of aftermarket exhaust parts are 4" as are the mrec risers....

 

[markmark1121980]

Re: 3 inch exhaust big enough?

i know it will be big enough but will the sound be better with 4 inch

 

[Mkos1980]

Re: 3 inch exhaust big enough?

It all depends on the sound. What size are your risers? Chances are they are 4in already so Ya gotta stick with 4in anyways. I know when I did my Corsa Q&Q It all came in 4in.

 

[Shrub88]

Re: 3 inch exhaust big enough?

i know it will be big enough but will the sound be better with 4 inch

What size risers do you have?

I've got 3 inchers on the Checkmate with 3 inch thru-hulls and it runs and sounds great without being loud at all.