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1998 454 MPI exhaust
I have stock exhaust with a silent choice set up. I would like to up grade, my question is I would like to keep my silent choice, that must limit my options, do they make a header or manifold that would work?
thanx |
Fixx
Originally Posted by bert4332
(Post 3085445)
I have stock exhaust with a silent choice set up. I would like to up grade, my question is I would like to keep my silent choice, that must limit my options, do they make a header or manifold that would work?
thanx |
Originally Posted by mrfixxall
(Post 3085447)
all the after market offer a silent choice riser,eddie marine,imco,stainless marine just to name a few offer a performance style manifold and silent choice riser..
Mrfixxal is right, they just about all make systems that would work. Keep in mind though, if you have the 310HP MPI, there isnt much to gain by switching to a header or performance manifold. Best bang for the buck is finding a pair of used take off 496 ALUMINUM manifolds. They switched back to iron manifolds, but there were a few years (02-05??) that they used aluminum manifolds with a dry joint riser. These flow pretty good, and would be a great upgrade over your wet joint manifolds. Flow better, less weight, work with silent choice, no leaky wet joints to smoke your motor, and usually you can find 4 manifolds and elbows for 1/4 of what one set of new CMI would cost.... |
Originally Posted by MILD THUNDER
(Post 3085456)
Not Stellings! :drink:
Mrfixxal is right, they just about all make systems that would work. Keep in mind though, if you have the 310HP MPI, there isnt much to gain by switching to a header or performance manifold. Best bang for the buck is finding a pair of used take off 496 ALUMINUM manifolds. They switched back to iron manifolds, but there were a few years (02-05??) that they used aluminum manifolds with a dry joint riser. These flow pretty good, and would be a great upgrade over your wet joint manifolds. Flow better, less weight, work with silent choice, no leaky wet joints to smoke your motor, and usually you can find 4 manifolds and elbows for 1/4 of what one set of new CMI would cost.... Something like this for the risers? http://www.offshoreonly.com/forums/s...657-parts.html And this for the exhaust? http://www.offshoreonly.com/forums/s...m-headers.html thanx again! |
You might gain 15hp and maybe 1mph.
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Originally Posted by Griff
(Post 3085495)
You might gain 15hp and maybe 1mph.
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Fixx
Originally Posted by MILD THUNDER
(Post 3085456)
Not Stellings! :drink:
Mrfixxal is right, they just about all make systems that would work. Keep in mind though, if you have the 310HP MPI, there isnt much to gain by switching to a header or performance manifold. Best bang for the buck is finding a pair of used take off 496 ALUMINUM manifolds. They switched back to iron manifolds, but there were a few years (02-05??) that they used aluminum manifolds with a dry joint riser. These flow pretty good, and would be a great upgrade over your wet joint manifolds. Flow better, less weight, work with silent choice, no leaky wet joints to smoke your motor, and usually you can find 4 manifolds and elbows for 1/4 of what one set of new CMI would cost.... |
Fixx
Originally Posted by bert4332
(Post 3085486)
I have a Magnum, 385hp, Corsa SC,and I want to buy used for sure. Is there a specific part # or name of the riser that would fit? I have a single engine so I only need a pair. What would be a price range for a used pair? What type of HP gain would I expect with the swap?
Something like this for the risers? http://www.offshoreonly.com/forums/s...657-parts.html And this for the exhaust? http://www.offshoreonly.com/forums/s...m-headers.html thanx again! http://eddiemarine.com/store/cart.ph...l&p=13076&c=63 |
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