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Need O2 Sensor Advice for Long Tube Headers

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Old 12-09-2018, 09:50 AM
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Question Need O2 Sensor Advice for Long Tube Headers

On my 2001 Camaro SS (5.7 LS1), I am putting Speed Engineering long tube headers with their 3" pipes and mufflers to the rear, and I am seeking advice on whose upstream O2 sensors to use. I have read enough on similar posts here to know this gets people into trouble--engine codes, etc.

For reference: Best o2 sensors for ls1? (lts+ory)

When I go to popular online sites such as Summit and Jegs, they show different sensors for left and right upstream sensors. I am confounded by why they wouldn't be the same. Other posts here have scared me of using Bosch sensors, and have me wanting to try Denso's.

Summit shows Denso 234-4025 for upstream left, and Denso 234-4087 for upstream right... why wouldn't they be the same? (I am worried that the distinction might not apply to a vehicle running headers.)

Thanks in advance.
Old 12-09-2018, 11:56 AM
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Left and right differences might have to do with connectors or wire length
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Old 12-09-2018, 12:02 PM
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That makes sense--thank you.
Old 12-09-2018, 12:13 PM
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I used Corvette O2's since they have a longer wire.
Old 12-09-2018, 03:57 PM
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I just used the Bosch 13111 sensors. Been on for over 10 years and Ive never had a problem
Old 12-09-2018, 04:14 PM
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The ngk,s never done me wrong. They are different p/n left to right wire length/ smaller (tip) on one side. But never a problem.
Old 12-10-2018, 12:11 AM
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Don’t forget to order u some extensions so that they’ll reach upstream from the headers. But if ur not running cats there is no point in running O2s past ur headers; in this case u would need those O2 simulators. But I would recommend cats and some thermal tape to place right above them.
Old 12-10-2018, 05:48 AM
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Thanks to all of you, I feel confident I'll get this working now.
Old 12-16-2018, 03:47 PM
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To add to this I just put the speed engineering long tubes on mine and the 24” extensions are way too long for the drivers side so I’d get a 12”.




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