Quote:
Originally Posted by JR-Vette
If you choose to install these best is to have them as far away from the 02 sensors as cutouts will effect the exhaust makeup and temp which cause 02 sensors to report incorrectly and cause false lean conditions, surging and decel issues so PCM is forced to run a rich bias.
Keep in mind the head designs of today like a bit of backpressure to help extract exhaust from cylinders at low engine loads so another reason for cutouts to be placed in the back rather I have seen many installed up front
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Take a look at the links I have posted and you will see where they are mounted for that very reason. And we have seen a consistant 10whp gain and up to 14whp with these.