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Exhaust questions

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Old 10-11-2018, 10:16 PM
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Default Exhaust questions

donít know what to do Iím a boater on a budget, it took me 3 years to save the cash for the boat I wanted. Knowing that boating is not cheap Iíve been saving money for 3 more years knowing my motors would have to be rebuilt at some point, and that some point is now (700 hrs and a pair of stock 454 mags). I have a time set with my engine builder to build me some 496ís, Ive been looking for exhaust and good lord thatís gonna cost me. Whatís everyone take can i get away with stock should I buy EMI, stainless marine, imco? Iíve been reading on here about revolution marine exhaust but canít find it anywhere any suggestions would be great
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Old 10-11-2018, 11:01 PM
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Well at least you don't have a boat payment. That's a good thing. What kind of power you looking at building 550-600? Being on a budget I'd look at some Stainless marine's or Gil's in the swap shop. There always in there. Just make sure there pressure checked and preferably fresh water. There's a lot of threads on hear in regards to exhaust. Do a search when you can.
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Old 10-11-2018, 11:12 PM
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There's 2 sets of Hardin marine Stainless headers a page back in the swap shop now. 3k for both sets. Just an FYI.

40fasthawk has them. Otherwise check with sick stinger.

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Old 10-12-2018, 01:41 AM
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Revolution Marine has been out of business for several years.

You cannot use stock exhaust with any significant cam upgrade.
You will need long risers/tail pipes that don't mix water until very close to the transom for any decent cam..
If your builder is a MARINE engine builder, then he should know what exhaust you need.
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Old 10-12-2018, 10:14 AM
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Exhaust is the worst part of performance boating. Ungodly expensive and can ruin an engine quickly. Also depending on build runner length matters for true power. Gils/SM work but you will give up power on an NA setup. Longer runner headers like cmi sweeper would be the best but they are 6k+ a set
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Old 10-12-2018, 02:57 PM
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Runner length without a doubt is NA's best friend. 2,900 set at diamond perf.
bck and DiamondPerformance like this.
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Old 10-12-2018, 03:14 PM
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Other thing you should check is your center to center dimension. Not sure what boat your have but that can limit your options as well. I had a 32' with only 32 5/8". (Not very common). Etops with aftermarket dart heads I had about a 1/16th" btwn the two inner. Lightening builds a header for tight centers but once again not exactly what I would consider if on a budget.
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