Originally Posted by don johnson

I installed the Milltek 200 cell cat exhaust 2 weeks ago and am very happy with it, it produced a nice mellow sound which was important given this car is my wifes daily driver and is a cabriolet but has enough of a low, non resonating sound to make driving it more engaging. The performance difference was surprising. This is an X50 car with a UMW tune and it was night and day. I know many are pro 100 cell count and I am sure it would run a little better with 100 cell but that said the exhaust made a big difference in all around performance. They say that the peak HP and Tq increase is somewhere around 20 hp and 20 ft pds tq and you can feel the increase in peak HP but the exhaust actually makes a huge difference all around, the turbos spool up WAY quicker and at lower RPM. Driving along in 6th gear at 65 and pushing down the go pedal is pretty fun without a downshift now....

My wife commented on how the car no longer wants to die in casual clutch release off the line which was also a surprising benefit.