I am having trouble finding a good 4" exhaust hose to run on my cruiser boat. The engine is a mostly stock 350 sbc with omc log manifolds on it 4" outlet to 4" tips, only about an 18" run from the manifold to tip. I keep burning holes in the top side of the exhaust hose, i am not sure why it keeps doing this but there seems to be plenty of water running out of the tips even at an idle and it doesn't feel all that hot when it is running, i mean you can touch it for a few seconds and it wont burn you. Hose that is currently burnt up on the boat now is mpi exhaust hose. I even put an 8" piece of 4" exhaust pipe inside the hose and clamped it in and it still burnt out the small areas where hose was exposed to the exhaust gas. I have looked for a different type of hose and found some trident marine silicone soft wall exhaust hose but i cant seem to find a dealer with the hose in stock. Anybody have any ideas?

Hose Man

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i had west marine back when i had logs... be sure to check the "remnants" section, you can find a nice 4" with the wire inside of it piece for cheap or even half off.

Use pipe and small sections of hose at the ends..

The water distribution on the outlets is inadequate, you will have more success using the pipe.

You could use copper pipe (kind of expensive) or even EMT conduit as an experiment (done it several times and it lasts quite a while)..

GT

i have 4" stainless steel tubing if anyone is interested.  i have 2x 4' sections.  same stuff i used for my exhaust and polishes up great.

i have 4" stainless steel tubing if anyone is interested.  i have 2x 4' sections.  same stuff i used for my exhaust and polishes up great.

Best idea. ka0tyk, just wondering why you did not use some stainless elbows where your miter cuts are. Just wondering out loud.
T.J.

I own a Diesel exhaust shop in Santa Fe Springs and I can get you a deal on stainless elbows and pipe if you guys are looking.

what degree 45, 90?

about $85 per

long story short i asked a friend if he could make them like a picture i showed him.  he said sure, and i told him that i wanted a 45* angle from that point and then another 45* angle outwards, and well... i got EXACTLY a 45* angle... i guess i shouldve been more specific.  i wouldve wanted a mandrel bend, maybe later on, I cant argue with free from a friend though.  i looked at 45* mandrel 4" stainless bends and they're NOT cheap.  my whole exhaust cost me about $500 when i was all said and done. $50 for the manifolds, $200 for the risers, $100 in transom rings and $100 in SS tubing, the rest into misc fittings and crud.

Ahh got it. Looks pretty cool anyway.

I own a Diesel exhaust shop in Santa Fe Springs and I can get you a deal on stainless elbows and pipe if you guys are looking.

   Whereabouts in SFS are you? I work at Daniels Tire Service in SFS

I got some sitting in my shop. Its made by a silicone company called purosil in corona good shit i bought it to use on my Glencoe with tt headers. Let me know how much you need and I'll hook you up.

I'm looking for about 3 feet of 4 inch if your interested to sell I'm buying let me know with the ride to 98230

What's my price on some turn ups for the flatty headers lol

Turn ups? You ***....

my hose is actually 3.5 inch not 4

 

It's always a half inch too damn small....