I have the Roadstersport Super Q, Roadstersport Mid-Pipe, Injen Air Intake, and 1320 Performance Headers. My CEL stays on after starting the car, which was not an issue prior to the upgrades. The codes were P0421 and P0171. 1320 Performance recommended to purchase their angled spacer which I did and installed on the secondary O2 sensor per their instruction. The CEL didn’t stay lit after starting the car and driving it on the freeway, but it eventually came back on the next time I drove the car. The codes I’m getting this time are P2096 and P0137. I was wondering if someone out there is having similar issues and how it got rectified. I greatly appreciate any feedback anyone may have. Otherwise, I am planning on just having my stock headers re-installed and not have to deal with the CEL issue; lest, I have a real engine problem in the future and wouldn’t know that it’s actually a legitimate issue. Thanks so much!