Ah I see. What is the likelihood of any issues from replacing a downpipe with a 100cpsi sports cat and removing the OPF? I’ve always heard replacing the downpipe is good for the car ... better flow for exhaust gases?It’s all to do with cause and effect.
so, for example, if you replace your down pipe, and say that down pipe changes the backpressure on the system, which in turn causes the turbo to fail, you won’t get the turbo replaced under warranty as it’s failure was caused by something you changed linked to it.
Ok i see how it works now.No, neither would invalidate the warranty as whole. As such, remapping would invalidate the warranty on the engine and transmission etc.
Depends, most likely the car will drive fine with the EML on. In some cases it may go into limp mode.
It would of course fail an MOT though.