How do these fit and what do they actually do - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68anniversary · 02-16-2011, 10:38 PM

I need to know if anyone knows what these do and which way they go in the exhaust pipes? I have new gaskets on the the way they seem to fit but I am undecided on how they work. I have stock manifolds. The one has a smaller hole than the other one. Motor is a 350 4bl 350 auto. Mods please move if I posted in the wrong area. I am hoping more people here would know.

sjarrett71 · 02-16-2011, 10:54 PM

Those are donut gaskets and they help seal your exhaust pipe to the manifold. It looks like your are mounted on some tyoe of guides to keep them lined up properly. I've never seen those before. Usually they just fit in between the manifold and pipe.

Sammy · 02-16-2011, 11:10 PM

Those are to prevent from burning out the donut gaskets so easily. They fit between the manifold and the first pipe. Help preventing leaks at the manifold. Pretty self explanatory on intallation they only fit one way with the gasket on it..

68anniversary · 02-16-2011, 11:13 PM

well, self explanatory but they are different. Which side does which one go? I was guessing the one with the smaller hole goes on the drivers side? They both fit into the exhaust the same way. Either could go on either side. I want to make sure I put the one with the smaller hole on the correct side

ETsC10 · 02-16-2011, 11:27 PM

IMHO, the one on the right looks like the fitting for a stock ramhorn manifold.
The one on the left is someone elses guess.

They, if you have the stock ramhorns (I assume on a '68 SBC V-8),
they should both be the same, size and fitting wise..

Sammy · 02-16-2011, 11:31 PM

Those can be made at a exhaust shop. Both should be the same identical in size. My guess is the one is a shop's custom version poorly done.

Andy4639 · 02-17-2011, 07:45 AM

The right one looks factory. The left looks like a home made one out of a piece of exhaust pipe to fit.

**special-K** · 02-17-2011, 10:25 AM

I'd cut the one on the left down to eliminate the reduction. Not sure what that's all about but what good comes from restricting exhaust flow?

68anniversary · 02-17-2011, 08:16 PM

I think I am going to cut the tapered end off and just go with them as u suggested Special-K.

02-16-2011, 10:38 PM	#1
68anniversary Registered User Join Date: Jul 2010 Location: Peculiar, Missouri Posts: 125	How do these fit and what do they actually do I need to know if anyone knows what these do and which way they go in the exhaust pipes? I have new gaskets on the the way they seem to fit but I am undecided on how they work. I have stock manifolds. The one has a smaller hole than the other one. Motor is a 350 4bl 350 auto. Mods please move if I posted in the wrong area. I am hoping more people here would know. Attached Images Last edited by 68anniversary; 02-16-2011 at 10:40 PM.

02-16-2011, 10:54 PM	#2
sjarrett71 Registered User Join Date: Dec 2006 Location: Rolla, MO Posts: 2,463	Re: How do these fit and what do they actually do Those are donut gaskets and they help seal your exhaust pipe to the manifold. It looks like your are mounted on some tyoe of guides to keep them lined up properly. I've never seen those before. Usually they just fit in between the manifold and pipe. __________________ -Scott-

02-16-2011, 11:10 PM	#3
Sammy Registered User Join Date: Apr 2000 Location: Bonne Terre, Mo Posts: 3,005	Re: How do these fit and what do they actually do Those are to prevent from burning out the donut gaskets so easily. They fit between the manifold and the first pipe. Help preventing leaks at the manifold. Pretty self explanatory on intallation they only fit one way with the gasket on it.. __________________ '69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629"

02-16-2011, 11:13 PM	#4
68anniversary Registered User Join Date: Jul 2010 Location: Peculiar, Missouri Posts: 125	Re: How do these fit and what do they actually do well, self explanatory but they are different. Which side does which one go? I was guessing the one with the smaller hole goes on the drivers side? They both fit into the exhaust the same way. Either could go on either side. I want to make sure I put the one with the smaller hole on the correct side

02-16-2011, 11:27 PM	#5
ETsC10 Hand Crafted C-10 Join Date: Aug 2006 Location: Burien, WA Posts: 5,180	Re: How do these fit and what do they actually do IMHO, the one on the right looks like the fitting for a stock ramhorn manifold. The one on the left is someone elses guess. They, if you have the stock ramhorns (I assume on a '68 SBC V-8), they should both be the same, size and fitting wise..

02-16-2011, 11:31 PM	#6
Sammy Registered User Join Date: Apr 2000 Location: Bonne Terre, Mo Posts: 3,005	Re: How do these fit and what do they actually do Those can be made at a exhaust shop. Both should be the same identical in size. My guess is the one is a shop's custom version poorly done. __________________ '69 Chevy Long Fleet & '71 GMC Short Step & Project "ODD BALL" "You can wash a pig, soak it in most expensive perfume. In the end it is still just a pig." ODD BALL build thread http://67-72chevytrucks.com/vboard/s...d.php?t=478629"

02-17-2011, 07:45 AM	#7
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: How do these fit and what do they actually do The right one looks factory. The left looks like a home made one out of a piece of exhaust pipe to fit. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

02-17-2011, 10:25 AM	#8
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: How do these fit and what do they actually do I'd cut the one on the left down to eliminate the reduction. Not sure what that's all about but what good comes from restricting exhaust flow? __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

02-17-2011, 08:16 PM	#9
68anniversary Registered User Join Date: Jul 2010 Location: Peculiar, Missouri Posts: 125	Re: How do these fit and what do they actually do I think I am going to cut the tapered end off and just go with them as u suggested Special-K.



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