New O2 Sensor - Drop in MPG - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

2000-2005 Discuss your 2000-2005 Bonneville SE, SLE, and SSEi Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-29-2005, 01:41 AM   #11
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A Magnaflow Hi-Flow cat should cost you about 60 bucks tops. A rear O2 spoof MAY be required.
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