Looking to put performance exhaust on brothers boat.
I've been online & read little on the different makers.
But was wondering what people have to say that used them,
what brand they used and what improvement if any.For example, CMI vs IMCO vs Eckert vs Stainless or DANA

The motor is a built 454 don't remember exact specs right now but has stroker crank ,bigger cam, higher
flow intake. But still has stock exhaust/manifolds and told adding perfromance exhaust would help quite a bit.
The motor was rebuilt by Wilson's Marine took a 93 liberator 221 from 55 to 66-67 no bs. Wilson's has recommendations that I believe. But just wondering about other boaters improvements. Oh yeah Wilson's was great. answered all ?'s
made recommendations .Boat runs better than ever

Look into the EMI's ...they were good for the price.

The EMI's are cheap and they seem to stand behind their product but I've seen a few sets fail recently and I'm not very impressed...

I still stand behind the workhorse, Stainless Marine!

Check the forum previous threads here on exhaust and headers for marine engine, there is enough info and comparisons with feedback from sellers, users and others to fill a set of Encyclopedia Brittanicas !!

Best Regards,
Ray @ Raylar

I have a 221 libby with EMI thunders on stock motor sounds great. Used to get 51mph with a 21 stainless. Put a 21p stainless tempest plus from merc blades on and brought it up to 58mph. good blade for this heavy boat

CMI Unitops are a great bang for the buck if he has standard Bravo exhaust holes. http://www.custommarine.com/headerapps/ElbowTop.php

stainless marine gets my vote. go with the dry setup.

Emi's,,been running them for years..Best bang for a buck in my eyes..i solt many many sets and never had any issues..

Did you want mainfolds or headers? Do you want to look stock or do you want bling. Some power or the most power? Go with CMI

I say stainless marine.,,,had them on mine for 8 years in salt water and never any issues...