Exhaust System :: Tips & Accessories Concept Z Performance GReddy 3.0in Universal Revolution Muffler 13 Best High Performance Mufflers of 2018 Adjustable Mufflers and Z32 Exhaust System :: Exhaust Systems & Kits Concept Z Performance. GReddy is proud to announce the Revolution RS line of exhaust systems. Named for the revolutionary approach to the design and construction of each application, this racing sport line focuses on performance with an aggressive look and sound. Careful attention to the flow of exhaust layouts and the internal straight through construction of each muffler and resonator sets this system apart from similar looking imitators. Updated ultra high temperature resistant, sound suppression materials of various densities and high quality TIG welded 304 stainless steel provide premium quality at an affordable price. The tri mounted Revolution tip also allows for customization of sound levels and styling via an optional silencer and a burnt Titanium tip. As with our new exhaust lines for 2014 15, the Revolution RS is covered by a limited lifetime warranty. GReddy 3. 0in Universal Revolution Muffler