About SuperTrapp For more than 30 years, SuperTrapp Industries, Inc. has been a leading manufacturer of comprehensive performance exhaust systems for a variety of motor vehicle applications, including motorcycles, ATV and automotive. In addition to their signature tunable disc diffuser exhaust systems, SuperTrapp manufacturers the Kerker brand of exhaust systems. SuperTrapp Industries, Inc. is headquartered in Cleveland, Ohio. This system, is also dyno tested by us, you can buy this article to go with it: TWremapxr1200 Also see the adjustable endcap works great article: ZD731434 We also have a fuelmap for this exhaust, look for article: TWremapxr1200