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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #31  
Old 12-03-2011, 09:46 PM
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Originally Posted by XC450 View Post
Do us 3rd Gen guys need O2 sensor extensions? I haven't had a chance to look under to see where the stock location is.
if your gonna run lt's, yes, you'll need extensions...I just spliced in added wiring on mine..
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  #32  
Old 12-05-2011, 08:32 AM
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Originally Posted by chefred112 View Post
if your gonna run lt's, yes, you'll need extensions...I just spliced in added wiring on mine..
I was under my truck this weekend and verified that there are 4 O2 sensors. With the PaceSetter Long Tubes, do they have 2 or 4 bungs? From trhe picture it likes only 2.
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  #33  
Old 12-05-2011, 08:35 AM
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OOOOOHHHHHH! and I forgot to mention that I didn't buy my headers yet because my wife is going to buy them for christmas!!!!
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  #34  
Old 12-05-2011, 08:43 AM
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I was under my truck this weekend and verified that there are 4 O2 sensors. With the PaceSetter Long Tubes, do they have 2 or 4 bungs? From trhe picture it likes only 2.
The two O2 sensors closest to the engine, they are called the upstream sensors. They are the important ones that you must retain. They give the ecm input for a/f ratios.

The two O2 sensors after the catalytic converters are called the downstream sensors. Their primary purpose is to monitor the efficiency of the catalytic converters. On most vehicles that is their only purpose, but I've read that on chrysler's they have a minor impact on a/f ratio input as well. Keeping these two sensors is sort of optional.
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