is there a block off plug for exhaust bypass hole

candrive55

candrive55

Petty Officer 2nd Class
Joined
Sep 16, 2010
Messages
116
Swapping out a 360 to a 350. My new exhaust y has no by pass hole. But the transom shield does. is there a type of plug for it and if so whats the part number. the shield looks like this.


Also can some one tell me why some exhaust y have 1, 2 or no holes at all. And what do they do anyway
 

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Don S

Don S

Honorary Moderator Emeritus
Joined
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Messages
62,321
Re: is there a block off plug for exhaust bypass hole

Those are idle relief port. Never heard of a 360, but a 350 should have 2 relief ports.
Not sure what you have with no relief ports. Do you have a picture of your exhaust Y with no ports?
 
candrive55

candrive55

Petty Officer 2nd Class
Joined
Sep 16, 2010
Messages
116
Re: is there a block off plug for exhaust bypass hole

Hi Don thanks for the reply. Been stuck on this for a week or more... Even just knowing what its called has helped with the search.
Will get pic today. In the mean time is it possable to go with no relief holes. This Y came from a 351 ford/270 volvo.
Pic coming soon
 
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