I fitted a Hoffman sports cat to my e36 yesterday, I took her out for a bit of a drive today and at first it felt as though I had lost a bit of lower end torque. This was mainly felt in second gear up to about 20-25mph, as it got past this though she took off . After a bit more driving and a stop I believe the ECU even though it is remapped has adjusted itself to this sports cat and the lower end torque rectified itself to how I remember. BMW is amazing on how quickly it adjusts and adapts to not only driving changes but parts aswell.
Has anyone else experienced this with any breathing mod or even a cat delete?