best exhaust manifolds
#12
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Location: Virginia
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Re: best exhaust manifolds
I agree, talk to your engine builder or supercharger distributer. Headers will definitely help but is the additional money worth the increased HP. All boils down to how much you want to spend.
#14
'05 Concept SF23
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Re: best exhaust manifolds
I had a set of EMI on a 502 EFI Mag. I did not like them as much as the GIL's I had on my other boat or the CMI's I have on my current boat. My ex son in law has SM with long riser/pipe combo on his 540's and the seem to work well. Any exhaust that uses the jumper hose from manifold/header to pipe needs to be checked every year for colaspe. I have found this more than once. Joe Murray
#16
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Re: best exhaust manifolds
I swapped over from an old stock log style manifold to Dana's. The only reason I picked Dana's over the others is I like the way they look. I think all aftermarket exhaust are going to be close in performance. I'd say headers if you want to spend that kind of money, and if you are making enough power to really make use of them. If nothing else, I save 90 pounds swapping the exhaust.
#19
Re: best exhaust manifolds
I did a lot of research on this matter myself. I chose the
Dana Marines for silent choice system. The Danas and the
EMIs can be colored to your taste. I wanted this over a
standard black manifold. The Stainless Marine choice is an
excellent one and I heard of great customer service. I ordered
my Danas in October and I still do not have them on my engine
due to oil line/filter interference issues and missing parts. I
was assured before I ordered them that there were no known
installation problems. It is now mid January and I still have
no solution from the guys at Dana Marine. Bob at Dana knows
of the problems and said a solution is imminent. I will wait
a few more weeks then I think I will have to send them back.
I really like the way they look and the Danas were highly
recommended to me by Ray at Raylar. I thought I made a
great choice, but perhaps not. They do look good though!!!
Stock Merc 502 Mag MPI.
O.K. maybe my mechanic is not the most knowledgable, but
she works all day for a Mickey Mouse pancake and a side of
bacon.
Dana Marines for silent choice system. The Danas and the
EMIs can be colored to your taste. I wanted this over a
standard black manifold. The Stainless Marine choice is an
excellent one and I heard of great customer service. I ordered
my Danas in October and I still do not have them on my engine
due to oil line/filter interference issues and missing parts. I
was assured before I ordered them that there were no known
installation problems. It is now mid January and I still have
no solution from the guys at Dana Marine. Bob at Dana knows
of the problems and said a solution is imminent. I will wait
a few more weeks then I think I will have to send them back.
I really like the way they look and the Danas were highly
recommended to me by Ray at Raylar. I thought I made a
great choice, but perhaps not. They do look good though!!!
Stock Merc 502 Mag MPI.
O.K. maybe my mechanic is not the most knowledgable, but
she works all day for a Mickey Mouse pancake and a side of
bacon.
Last edited by dbkski; 02-01-2011 at 04:35 PM.