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#1
06-13-2007, 12:23 PM
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just a bit curious
i work at a car audio shop, we just had a 2007 or 2008 "new body style" 2500 HD in and I noticed the tail pipe of the exhaust just wacky. The first part tapers down kinda small and then another peice of pipe is over that but not sealed tight just held on by 3 rods so there a big open space around where the two pipes "meet" and then the back end up the pipe is flared out.
Us over here are just puzzled why there would be any need for this. So if anyones knows that would be excellent thnaks
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08 2500, Black Maxx, EGR delete, cat and DPF delete, S&B intake, 20x10 Hostage wheels wrapped in 35" Toyo M/T 
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#2
06-13-2007, 03:32 PM
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Re: just a bit curious
A picture would help here
 It's probably just one of those high dollar but worthless aftermarket things
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'04 Cavalier coupe M/T 2.2 Ecotec Supercharged 14 PSI boost, charge air cooler, 42# injectors Tuned with HP Tuners Poly engine/trans/control arm bushings Self built and self programmed progressive methanol injection system
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#3
06-13-2007, 05:59 PM
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Re: just a bit curious
Heat Shield?
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2001 5.3 LS Stock 6 channel Alpine 3566 Amp Jason Extreme Slam Camper Shell Michellin X-Radials 79K Miles
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#4
06-13-2007, 06:44 PM
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Re: just a bit curious
Quote:
__________________
08 2500, Black Maxx, EGR delete, cat and DPF delete, S&B intake, 20x10 Hostage wheels wrapped in 35" Toyo M/T
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#5
06-13-2007, 06:45 PM
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Re: just a bit curious
Quote:
__________________
08 2500, Black Maxx, EGR delete, cat and DPF delete, S&B intake, 20x10 Hostage wheels wrapped in 35" Toyo M/T
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#6
06-13-2007, 06:55 PM
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Re: just a bit curious
http://www.chevrolet.com/silverado/photogallery/
the last picture you can see how the tail pipe is flared on both ends what you can't really see is at the front side where the lighter silver stops thats where the other pipe goes in but with out making contact with it except via a few rods. Go to your local chevy dealership and see if they have a 2500hd diesel, prolly also 3500 diesel, and look at the pipe the ish is wacked
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08 2500, Black Maxx, EGR delete, cat and DPF delete, S&B intake, 20x10 Hostage wheels wrapped in 35" Toyo M/T
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#7
06-14-2007, 11:55 AM
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Re: just a bit curious
You know I saw one of these on a new truck the other day and wondered WTF?
It looked bizarre, almost like some sort of noise cancel device or added device??? I know what your talking about though. Maybe it's just Chevy's way of making the tailpipe look "cool" I just think Chevy got the whole Silverado WRONG this time. It looks stupid. I'm not in the market for a Dually but you get the idea with their HD line. Here is a comparison.  If I was shopping for a new truck I can tell your right now that it wouldn't be a Silverado. They just look all wrong to me. I'd probably go for the Sierra instead.
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 2008 GMC ACADIA SLE Edition, 7 passenger model I AM Canadian!! 
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#8
06-14-2007, 12:42 PM
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Re: just a bit curious
Quote:
__________________
08 2500, Black Maxx, EGR delete, cat and DPF delete, S&B intake, 20x10 Hostage wheels wrapped in 35" Toyo M/T
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#9
06-14-2007, 04:22 PM
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Re: just a bit curious
That's an easy one...as the air passes by the small tubing inside the larger one it picks up speed and helps pull the exhaust out of the tailpipe. It helps exhaust the exhaust :-)
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#10
06-14-2007, 04:40 PM
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Re: just a bit curious
Quote:
You have nailed it.  It is used on some newer ones and some diesel exhaust systems to help get the exhaust out. If it is removed on the ones that have it OEM they will run like crap without it. MT
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Remember proper testing gives us the answer to many problems. MT
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#11
06-14-2007, 04:41 PM
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Re: just a bit curious
Quote:
__________________
Remember proper testing gives us the answer to many problems. MT
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#12
06-14-2007, 06:45 PM
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Re: just a bit curious
Quote:
__________________
08 2500, Black Maxx, EGR delete, cat and DPF delete, S&B intake, 20x10 Hostage wheels wrapped in 35" Toyo M/T
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#13
06-14-2007, 07:09 PM
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Re: just a bit curious
yupp i saw one at the dealer not ot long ago and was pretty supprised by the size
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#14
06-15-2007, 09:43 AM
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Re: just a bit curious
Quote:
I can not explain just how it works but. If it is removed it will not run right. MT
__________________
Remember proper testing gives us the answer to many problems. MT
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#15
06-15-2007, 11:47 AM
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Re: just a bit curious
The 07 and newer diesels are now required by law to run Ultra Low Sulfer Diesel (ULSD) have a particulate filter installed in the exhaust system. The filter traps particulate matter in an effort to lower this type of emmisions. Every 30,000 miles or so, whenever the filter is full/dirty, the system automatically regenerates the filter by increasing the exhaust temperature to burn off the trapped particulate matter. The shape of the exhaust is designed to cool the regen process. Modification of the system may violate these laws, so check before you do any work on the exhaust system.
http://www.dieselplace.com/forum/sho...goofy+tailpipe
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2002 1500 Ext. Cab 4.8L 2wd. K&N FIPK, Cat Back Exhaust, Rancho RSX Shocks, Silverstar Headlights High & Low, Infinity Reference Door Speakers & 10" Dual Voice Coil Sub. 265/75/16 BFG AT/KO's, Spray-In Bed Liner, Hella FF75 Fog Lights, Hella FF75 Driving Lights.
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