We have been a Research & Development facility for the past 6 years, and have been a key component in the design and engineering for major companies performance products. We have taken it upon ourselves to bring our knowledge of design and engineering to make a superior performance product of our own for the public to finally have access to. High Performance and cutting edge technology is our passion. With the HR1’s Variable Back Pressure Adjuster your customer will have the ability to make the power where they want it and have the ability for noise control. To create more bottom, mid, or top end power, just slide the side of the can, which will allow them to adjust the back pressure of the motor without having to disassemble, add plates or cones, while on the bike and even running! The HR1 is the most compact and one of the lightest cans available on the market at 3.5 lbs. With Hard Rock’s 2 year manufactures warranty and our life time silentex packing system combined with a CNC Billet can and V.B.P.A. “On the Fly” adjuster makes the HR1 the most versatile high performance exhaust on the market today.