Ville123

Greetings.
I have a 1987 twin 5.7 alpha one gen 1 boat with 6" spacers installed between the manifolds and risers to create an open exhaust. The boat had Y pipes removed by previous owner who also made the conversions. I am trying to convert back to original ( too loud for my neighbourhood, even with slip-in silencers ) but I wouldnīt want to remove the spacers for possibly installing a captains call system in the future. So my question is, if I install the exhaust elbows, the lower oval end will be 6" higher than the original rubber boot. I havenīt found an extended lower boot to use also. I found longer version of the exhaust elbows but they are a quite expensive (700 compared to 200 for the original size), and since they are supposed to accommodate to 3-6" inch riser spacers it still leaves the lower rubber boot height question unanswered. Are some different lenght rubber lower boots available or has someone used just a hose? The original boots are also angled a bit so if a hose is used it has to bend a little. And it has to be oval or bend into oval. Anyway, has anyone encountered and solved an issue similar to mine?


Thanks in advance,
Ville

resurrected

You could use a piece of stainless tubing and an extra boot or longer high temp silicone hose, but I doubt the long silicone hose would be Coast Guard approved.
If you are looking for Y pipes, I have one new never used for $100CDN plus shipping.

JaniH

Just a hose!!!!!

Griff

Have you thought about getting exhaust turn downs??

Ville123

Hi, thanks all for replying. I will try to use just a hose!. We have no coast guard problems here because boats do not have a technical inspection.
Regarding turn downs, I would like them very much, but my existing tips are over the swim platform, and this would mean some strange visible piping.



Best regards,
Ville

LakeHuronPower

You could try this
https://imcomarine.com/cal_store/ova...tachments.html