Been looking to get the secondary cat / resonator deleted but don't want to spend £800-900 for a xpipe.
I rang around to get a custom made and they ranged £135 - £260. Sounds good and worth a try.
Question is, I rang MIJ Performance and the dude mentioned that there is a sensor on the second cat and it may throw up a sensor error.
That's the only place that mentioned that it might have a issue, but he said he had an M3 himself before.
Is that true?