A midpipe is a hardware replacement. It does not change how the engine is calibrated, so no tune is normally required to run one safely. The engine management sees the same signals it saw before, because the parts that generate those signals have not moved.
The line is not whether you changed an exhaust part. The line is whether you removed or relocated something the engine monitors. Change or move a sensor-monitored component and the calibration assumption behind it no longer holds. That is a different job from bolting on a midpipe, and it is worth being explicit about which side of that line your build is on.
A midpipe that sits downstream of the factory sensors does not normally trigger one. If a warning does appear after fitting, treat it as information rather than an inconvenience: it is telling you something in the system is outside the range the ECU expects. Read the code before you clear it.
Send your complete setup, not just the part you are buying. Stock manifold, factory sensors and a midpipe behind them is a different conversation from a full turbo-back build. Tell us the whole picture and we will say plainly whether a tune is required for your combination.
Our midpipes and exhaust sections are listed under Exhaust Pipe. If you are unsure which section you need, send your chassis code and build year and we will point you at it.
