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Old 03-27-2012, 06:18 PM
JasonRB2k1 JasonRB2k1 is offline
Dodge Ram Forum Junior Member
Join Date: Sep 2011
Location: Dallas
Age: 31
Posts: 37
Gender: Male
Vehicle: 2011 Dodge Ram
Trim Level: Hemi Express
Color: Mineral Gray
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
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you do still need them with the cats. I got the ones with the high flow cats, but the system will read there isn't enough variance between pre and post cat o2 sensors. I held my pipe with the cat on it close to a light source, and you can see right through them.
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