Catalyst question.

[Jimmy]

(2013-11-24 10:15)Leon Wrote:  Removing the catalytic converter from a stock engine won't increase performance and if your lambda sensor is mounted after the converter, the ECU will go into safe mode and reduce horsepower. If the sensor is before, then replace the cat with a pipe. You won't have any issues other then failing the MOT if you show up without one. Unsure what the legal consequenses are for it in Sweden, though.

Don't put a big exhaust on an old Golf. Waste of time, money and effort. Start off with buying a car that has the power you want and work from there. Cars in Sweden are dirt cheap anyway.

Yeah but my lamdba sensor is not mounted on Catalyst its little higher up on exhauset system so i just could remove it and put in new one