XForce 3" Varex Valved Cat-Back System - Toyota GR CorollaTransform the driving experience of your Toyota GR Corolla with our ALL NEW VAREX Valve equipped exhaust system; engineered to take your GR to the next level. Through our extensive development and testing process weve been able to strike the perfect balance between sound and performance. Creating something tailormade for the Corolla GR. The system uses our cutting edge patented VAREX valve technology, allowing you to switch from Street to Race mode