I have just been talking to Johnny at Maptun about a new JT 3" system for my 9000 Aero. He is now offering two catalyst options - the Race and the Sports. As you might expect the Race offers even less flow resistance but costs an extra 1300 Krone (£100). Which version are people generally opting for? I can see future mods including an uprated Ecu but since I average 35k miles p.a. I am unlikely to do much more. BillJ which version are you running please?