Just to add to the thread, I am currently going through the process of returning my 03 cobra back to stock because I have also ben sent to the ref. I changed out my mid pipes to have 4 cats, changed my upper and lower pullies back to their stock sizes, removed my KB BAP, have a CARB approved CAI and had Ford reset my ECU back to stock. Next up is changing out my fuel injectors back to the stock 39lbs.
Do I really need to remove my Temp and boost gauges from the car? sounds a bit excessive to me
I removed them and plugged the holes with some plastic plugs from Amazon just in case. Not worth a fail for a 5 minute fix.