thinking of getting one of these, but I have heard where the branches meet it becomes a 2.5" pipe. Now the problem I can see is that I have a 2.25" system - how bad would it be for exhuast gas speed for a 2.5" pipe to meet a 2.25" system? - would this cause much of a problem where the pipe narrows suddenly?
One reason for getting it is so I can fit a lambda sensor as I dont appear to have one!
(Might explain my high CO emissions)