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Old 02-09-2006, 04:44 AM   #1
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Default picture definition of the W-body U-bend

i had always pictured it way different than this, but i just found this picture and wanted to share in case anyone else wanted to know

bonnevilles DO NOT have this



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On the factory exhaust for your car, GM decided they wanted the O2 Sensor mounted vertically which resulted in what'* been termed the U-Bend. This restrictive section of pipe causes added backpressure resulting in power loss. Modifying your car with a different intake system and/or smaller pulley only makes this restriction worse. Free up this restriction with our U-Bend replacement.
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Old 02-09-2006, 12:51 PM   #2
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What the hell was GM thinking?

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Old 02-09-2006, 12:54 PM   #3
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That was one of the first things I got rid of when I got the car.
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Old 02-09-2006, 01:06 PM   #4
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Why did they put that there? It doesn't even make sense.
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Old 02-09-2006, 01:06 PM   #5
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Quote:
Originally Posted by fantastic88
Why did they put that there? It doesn't even make sense.
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GM decided they wanted the O2 Sensor mounted vertically which resulted in what'* been termed the U-Bend
why that? i have no idea
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Old 02-09-2006, 01:07 PM   #6
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Quote:
Originally Posted by jr's3800
What the H*** was GM thinking?
i belive they wanted to keep the 02 sensor and wires sheltered, so as not to be torn off by anything you drive over
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Old 02-09-2006, 01:27 PM   #7
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Originally Posted by toastedoats
Quote:
Originally Posted by jr's3800
What the H*** was GM thinking?
i belive they wanted to keep the 02 sensor and wires sheltered, so as not to be torn off by anything you drive over
In the owners manual..it clearly states "No Offroading!"
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Old 02-09-2006, 01:34 PM   #8
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Quote:
Originally Posted by BillBoost37
Quote:
Originally Posted by toastedoats
Quote:
Originally Posted by jr's3800
What the H*** was GM thinking?
i belive they wanted to keep the 02 sensor and wires sheltered, so as not to be torn off by anything you drive over
In the owners manual..it clearly states "No Offroading!"
i might have to have this verified
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Old 02-12-2006, 11:02 PM   #9
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It was a wise decision by GM, my GTP scrubs the undercarriage going over those long speed bumps. The U bend does restrict exhaust flow, but it does make the stock exhaust sound cool right at the U bend. I would replace mine, but I'm not modifying it unless parts fail, like my fuel pump, I now have a Walbro. It'* just the beater car, I put all my love in the Bonnie.
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Old 02-13-2006, 02:22 AM   #10
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i wonder what those two cars are?

the first one is also missing a resonator.

i sure dont miss that u-bend though.
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