I had Kash cut out my suitcase muffler and install Vibrant 1794s on my Trackhawk. They did a good job. They are right down the street from Radial Tire in Silver Spring (who I highly recommend for tires).I have a set of Vibrant's sitting in my trunk till I can find someone I trust to put them on. I've been to several shops in Gaithersburg, MD and have not come away feeling real good about having them work on my car. I've had shops refuse the job because they thought the Vibrant's were catalytic converters and others whose welding is best described as "random". I'm all ears if anyone has a suggestion in my area as well.