I will let him decide how to go about avoiding the CEL. If we want this to keep the cat and avoid a CEL then that is how he will make it. Also don't worry about quality and making more power then the OBX as it will be better and outperform that without a doubt in my mind.
The banging is a concern so I will inform him of that. Do you have any pics of where the contact was?
205,125 miles when she was given away
35 mpg last tank
̶w̶a̶i̶t̶i̶n̶g̶ ̶f̶o̶r̶ ̶h̶e̶r̶ ̶t̶o̶ ̶d̶i̶e̶ ̶s̶o̶ ̶I̶ ̶c̶a̶n̶ ̶b̶u̶y̶ ̶a̶ ̶t̶r̶u̶c̶k̶,̶ ̶b̶u̶t̶ ̶s̶h̶e̶ ̶w̶o̶n̶'̶t̶ ̶d̶i̶e̶ She didn't die but I bought the truck anyway!!