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SignUp Now!Are the cats on the y pipe before or after the sensors?
The O2 sensors, which read the front cats, are located in the y-pipe though. Take out the Y-pipe and they cannot read the cats. Don't have an O2 SIM which replaces the sensors completely, and your ecu will not be happy.
I was under the impression it only pulls information from the front sensors which is why when you run a y pipe you can use your factory sensors and not run a code and only need to run sims on the front when you buy headersThe O2 sensors, which read the front cats, are located in the y-pipe though. Take out the Y-pipe and they cannot read the cats. Don't have an O2 SIM which replaces the sensors completely, and your ecu will not be happy.
I was under the impression it only pulls information from the front sensors which is why when you run a y pipe you can use your factory sensors and not run a code and only need to run sims on the front when you buy headers
As touchy as these motors are I would be afraid of burning a valve..