Varex™ mufflers use patented technology to combine both the design of the stock muffler and the performance muffler into one single compact unit. A sophisticated butterfly valve mechanism is implemented to redirect the exhaust gas flow and vary between the two. For higher sound level, the exhaust flows are directed through the opening path and produce maximum power with a robust sound level (or the “sports car note”) and near-zero resistance.
Whilst for lower sound level, the exhaust flows are directed through the chambered path (similar design with the stock muffler) and produces a minimum sound level that gives you the best in-car comfort. The angle of the valve is also controllable, which can be adjusted to stop at various points between sports mode and silence mode. This gives you further freedom to set the optimal sound level according to your desired preference.
Varex is sold either as a universal fitting product or as part of a direct bolt in kit where available. (Note that the item pictured features the Smart Box attachment which operates with a smart phone. This item is sold separately to Varex units at a cost of RRP $595 additional to the cost of the Varex unit).