Xforce 3" Cat-Back System with Varex Mufflers, 304 Stainless SteelXforce 3" Cat Back System with Varex Mufflers, 304 Stainless Steel Silenziatore Varex in acciaio inox 304. Introducing our Varex Cat Back System for the NX Skoda Octavia RS \n\nAdjusting your sound output and tone is achieved via the VAREX equipped rear mufflers via the supplied remote control. To allow owners to customise their sound output even further, this system is also supplied with an optional resonator delete pipe to further fine tune your