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Running with an open Y-pipe?

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Old 11-22-2004, 07:29 PM
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Default Running with an open Y-pipe?

I've read the running with open headers can ruin your o2 sensors. What about runnng with and open Y-pipe? Could I do any damage to my motor?
Old 11-22-2004, 07:35 PM
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The car will run pretty crappy cause the O2's will be sucking air on decel. I imagine that it could hurt the sensor after awhile. When I run open headers I clamp 16" long pipes to the collectors so the O2 sensors have about 19" of pipe behind them. You could run a open Y-pipe no problem but I image it would flex and move around more with the cat back unhooked.
Old 11-22-2004, 08:11 PM
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What if I welded a 18" bullet at the end?
Old 11-22-2004, 09:30 PM
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Why not just buy a cheap cutout and weld that in. Then leave it open. You can close it when/if you get annoyed.
Old 11-22-2004, 10:37 PM
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I ran an open y-pipe for about two weeks. I had only LT's and cats and flowmaster collector. I kinda liked the sound actually. It sounded a lot like a mustang, a little raspy, and loud, but I really liked it.
Old 11-23-2004, 06:35 AM
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Originally Posted by Uno99
What if I welded a 18" bullet at the end?
At the end of the collectors or y-pipe? If you wanted to put them right on the collectors it would be really hard to fit the drivers side. If you take a piece of 3" pipe and butt it up the collector you'll see what I'm talking about. The pipe has to go on a downward angle and you'd probrably have to flaten the floor and Bullet alittle for everything to clear. Not sure if the bullets would like all that heat either but it would be worth a try.
Old 11-24-2004, 12:40 PM
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Already have a cut out. Just thionking of different things to try.
Old 11-27-2004, 12:37 PM
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Reviving this thread from the dead. What are the risks of running headers w/just a y-pipe on the end? Its either this or running SS Kooks on stock exhaust right now, w/Kooks ORY. Which is the better option in everyone's opinion? TIA!
Old 11-27-2004, 01:20 PM
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On stock manifolds.
Old 11-27-2004, 01:53 PM
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Well, its either going to be SS Kooks headers into their ORY, bolted to the stock exhaust, or just the Kooks/Ory. No stock manifolds involved
Old 11-27-2004, 03:06 PM
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I doubt anything will get hurt, besides your brain from all the fumes.



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