Although most are of good design, factory diverter valves are built in a very conscious manner and the materials and overall life and reliability suffer. For the performance enthusiast, the diverter valve is an important component whose proper operation is paramount to optimal engine operation.
APRs R1 diverter valve addresses all of the reliability problems of the factory-supplied diverter valves and takes performance to the next level. The R1 is a diaphragm-based valve, which has less friction than a piston-based valve. The lower friction R1 diaphragm equates to faster response and better overall performance. Secondly, diaphragms do not require the periodic greasing that piston-based valves do. The R1 was designed to be maintenance free for the life of the product. Thirdly, a diaphragm based valve will never have a stuck piston.
The R1 is designed for optimal performance. The main body of the valve is investment cast in an aluminum alloy. By utilizing this casting process in lieu of a more conventional machining process, APR was able to optimize the internal geometry of the valve to provide the ultimate in flow performance. This geometry cannot be created utilizing conventional machining.
The diaphragm is created out of high temperature material and incorporates a Nomex fabric reinforcement layer for enhanced durability and a diaphragm that will never tear. The alloy main body is finish machined at APR and receives a multilayer corrosion resistant and cosmetic enhancing finish.
NOTE: 2.7 Liter Bi-turbo engines, such as that found in the Audi S4, will require TWO of these valves.
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