I am deciding on decating my long discussed car , I have spoke to a guy who does it for £160 for both pipes and said he can creat it in a way that it can be easily removed and replaced with the standard cat for MOT if needed.
Does the price sound reasonable? any idea of online shops or....?
On the other hand what are the pros and cons that u would predict, for instance no O2 or lambda sensor in the cat could mean the car will show up a error code. so don't know where to place the lambdas?
I am also not sure about the gain( i think maybe around 20 to 30 HP, sound to much ?) and would it improve mpg?