I mounted this muffler on my 86th Porsche 944 Turbo 4cyl to replace the stock muffler. I love the sound and the look is a definite plus! Seems to be very well made with good thick metal that welds easily and no need to worry about burn through. I like the aggressive sound, but it doesn't call out the car. getting too loud, which is nice. I'm in the process of upgrading to a high flow coil so I should get a decent performance boost between the combination of this silencer and the new cat. Thanks for a quality product!