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Old

01-27-2011 | 02:45 PM

#1

ken sampson

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Gil VS HP

What is the most HP you can flow thru a Gil exhaust.
Or how restrictive are they on Bigger CI motors?

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01-27-2011 | 03:21 PM

#2

Hang Time 27

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I'm curious on opinions on this too. It seems to me like naturally aspirated is around 550-575hp, and supercharged would be much higher...at ????

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01-27-2011 | 04:05 PM

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wjb21ndtown

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Just from boat shopping and seeing when people seem to upgrade to CMIs, around 575-600 hp seems to be the point where the benefit of going to a full header starts to kick in.

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01-28-2011 | 01:57 AM

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Griff

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They will choke the 604ci engines you posted about. Gils are Ok up to about 600hp NA. You need some Big Tubes.

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