2005 Chevy Silverado Truck Performance - Couch-Potato Power
2.There are four O2 sensors to contend with. We removed a couple of ours, but this isn't essential. You can move the cats around to make room for manipulating the driver-side header and manifold, but you should zip-tie the cats up so they don't pull on the wires of the O2 sensor. View Related Article
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