I had the GranSport up on the lift today to put on a BMC airfilter and it was the first time I had been under the car and I was taking a look at the exhaust set up. The catalytic converters look like they would really affect the exhaust flow. I figured that since I don't have emissions testing where I am that they could be replaced by straight pipes. Has anyone done this on a GranSport or Coupe or Spyder? Looking at Tubi's web site they show that they have test pipes to replace the cats on Ferrari's, but I couldn't find anything for Maserati. So does anyone know if Tubi or someone else makes test pipes for our cars or if it is something I would have to have a shop custom make? And about how much would it cost. Thanks.