looks like a web or honeycomb - I was looking around the truck and while preparing to install my new nerf bars I noticed this on the exhaust it is ...

fox4wd1981 · by **fox4wd1981** [OP] » Dec 17 2011, 10:54pm

I was looking around the truck and while preparing to install my new nerf bars I noticed this on the exhaust

it is located just after the Y behind the cats. What the hell is this thing? I have never noticed it before.

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tsduke · by **tsduke** » Dec 17 2011, 10:58pm

I've got one and I think it's in the same place. Dealer put it there when I was complaining about a vibration in the floor and a resonation in the cab. Didn't help....much. Not even sure why it would either.

MouSe · by **MouSe** » Dec 17 2011, 11:50pm

It's the resonator. Helps to reduce the "cackling" or "backfire" at high RPM.

bgdv1 · by **bgdv1** » Dec 18 2011, 3:19am

looks more like a flex pipe to alieviate stress on exhaust system. had to replace basicly same thing on my sons audi a4.

ASTE25 · by **ASTE25** » Dec 18 2011, 3:46am

It is a flex pipe. It helps reduce vibrations caused by the exhaust connecting the engine to the frame.

mtnchev · by **mtnchev** » Dec 18 2011, 3:58am

Pretty sure that is a flex pipe, to keep vibrations and strain off your manifolds/headers. looks like it may be leaking by the black color on it. You may be hearing some new sounds from your exhaust (a leak) and maybe some fumes up front with the windows down. Any exhaust shop can straighten that up for ya.

MouSe · by **MouSe** » Dec 18 2011, 4:03am

Well color me dumb. My foots gonna be in my mouth for awhile.

mtnchev · by **mtnchev** » Dec 18 2011, 4:09am

Dont worry about it! There are so many extra parts that engineers put into exhaust systems these days. No wonder why cars arent as cheep as they used to be! Gotta pay their salaries and pay for all the little parts that probably have no benefit! Why is a flex pipe neccessary? The exhaust hangs on rubber mounts! Just sayin

ASTE25 · by **ASTE25** » Dec 18 2011, 4:12am

I'd say because the rubber hangers do not flex enough when the engine moves under load. It also makes it act like the exhaust is shorter in regards to a solid piece of metal running the length of the truck.

BuxCamper · by **BuxCamper** » Dec 18 2011, 4:44am

If GM could save a buck by not putting it in, they would leave it off. However its presence probably means they have fewer other issues to deal with and in that way its cheaper to put it in.

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looks like a web or honeycomb - I was looking around the truck and while preparing to install my new nerf bars I noticed this on the exhaust it is ...

What is this webbing stuff on my exhaust pipe?

What is this webbing stuff on my exhaust pipe?

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Re: What is this webbing stuff on my exhaust pipe?

Re: What is this webbing stuff on my exhaust pipe?

Re: What is this webbing stuff on my exhaust pipe?

Re: What is this webbing stuff on my exhaust pipe?

Re: What is this webbing stuff on my exhaust pipe?

Re: What is this webbing stuff on my exhaust pipe?

Re: What is this webbing stuff on my exhaust pipe?

Re: What is this webbing stuff on my exhaust pipe?

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