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10-31-2012, 07:06 PM
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#1 |
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Registered User
Join Date: Mar 2009
Location: Idaho
Posts: 111
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Better Exhaust Donuts
Hey all. Here's the deal. I have 72 k/5 with a 350 sb with stock exhaust (manifolds, pipes, etc.). When I restored the truck about 2 years ago, I replaced the donut gaskets with the Napa ones. They only lasted about 2000 miles before burning up. So I just replaced them again and after another 2000 miles they're shot. The guys a t Napa told me this was normal. I drive my truck A LOT so I'm tired of replacing them. Question is, do any of you know of a brand of exhaust donuts that will last a considerable amount of time? Thanks.
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1972 k/5 Blazer 350V8/TH350/NP205 "The Ox" 
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10-31-2012, 07:55 PM
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#2 |
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Watch out for your cornhole !
 
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: Better Exhaust Donuts
Cut a couple of pieces of 2 inch exhaust pipe about 3/4 of an inch long each. Slide one into each donut then install the donut between the manifold and exhaust system. You end up with a steel bushing inside of the donut doing it this way and they won't blow out anymore.
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10-31-2012, 08:11 PM
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#3 |
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Registered User
Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,411
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Re: Better Exhaust Donuts
Search for AutoJet Muffler, in Des Moines, Iowa. I think they offer steel donuts.
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10-31-2012, 08:17 PM
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#4 |
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"Ochre Ogre"
Join Date: Apr 2000
Location: Springfield, MN
Posts: 3,558
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Re: Better Exhaust Donuts
They also make 2 different donuts. One is foil wrapped/embedded compressed fiber and metal something or other and the second style is solid metal. I have always used the solid metal ones on a rams horn.
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Bowtie Truck Stop Inc. Mid-West GM Truck Restoration Parts Supplier Your Key Parts, Auto Metal Direct, Dynacorn, and Goodmark dealer. like us @ www.facebook.com/BowtieTruckStop 1971 C-10 Suburban (Ochre) 1971 K-10 Suburban (Ochre) 1972 C-10 Suburban (Ochre) 1972 K-20 Suburban (Yellow- that just aint right!) Springfield, Minnesota 56087 |
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11-02-2012, 11:44 PM
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#5 | |
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Registered User
Join Date: Sep 2012
Location: Nevada
Posts: 40
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Re: Better Exhaust Donuts
Quote:
Exhaust Pipe Flange/Ring Sintered Metal Solid, quiet. The first and last pair I've bought. |
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11-03-2012, 01:16 AM
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#6 |
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Registered User
Join Date: Mar 2009
Location: Idaho
Posts: 111
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Re: Better Exhaust Donuts
Awesome, thanks fellas. Gonna look thru all these and upgrade
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1972 k/5 Blazer 350V8/TH350/NP205 "The Ox"
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11-03-2012, 01:55 AM
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#7 |
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Grandpa in the rustmobile...
Join Date: Nov 2008
Location: Spokane WA/Viola TN
Posts: 11,422
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Re: Better Exhaust Donuts
I got some kind of felpro solid metal thing, they said it was great product? im happy?
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John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4 |
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11-03-2012, 12:23 PM
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#8 |
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Registered User
Join Date: Jan 2009
Location: San Antonio, Texas
Posts: 1,374
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Re: Better Exhaust Donuts
Marking for reference
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1972 C10 LWB, 350/350 Deconstruction began 5/2009, mostly completed restoration, 5/2017 |
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11-03-2012, 12:49 PM
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#9 |
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Senior Member
 
Join Date: Dec 2011
Location: South Carolina
Posts: 2,662
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Re: Better Exhaust Donuts
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11-03-2012, 10:37 PM
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#10 |
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Registered User
Join Date: Apr 2000
Location: Bradenton, FL
Posts: 1,036
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Re: Better Exhaust Donuts
No its not common for them to burn out in 2000 miles. You need one of these. This is one for a big block. But they make them for small blocks too. I have a pair for small blocks but no part numbers. Good luck.
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1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters |
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11-04-2012, 10:53 AM
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#11 |
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Registered User
Join Date: Nov 2010
Location: Carlsbad, CA
Posts: 1,584
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Re: Better Exhaust Donuts
This fiber type lasted about me about two months
LEFT: Duralast by Felpro 60985 (solid metal type) RIGHT: ROI Gaskets EG24017 (fiber type)
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- Jim - My Daily Driver is a 1969 Chevrolet Custom/20 Fleetside 350/TH400/Eaton H052 4.10 and its Project thread is here http://67-72chevytrucks.com/vboard/s...d.php?t=456911 |
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