The APR R1 diverter valve was designed to be the ultimate solution to the problem of unreliable factory and aftermarket diverter valves and to be the leader in performance. 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.
Enter the R1: APR's R1 diverter valve addresses all of the reliability problems of the factory-supplied diverter valves and aftermarket replacements and takes performance to the next level. The R1 is a diaphragm-based valve. A diaphragm is the best option for a diverter valve for several reasons. First off, a diaphragm has negligible friction. Piston-based valves have considerable friction from the piston, o-ring, and bore assembly. 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. Piston-based valves must be greased periodically (usually every year or sooner), requiring removing the valve from the car, disassembling and reassembling the valve. The APR R1 was designed to be maintenance free for the life of the product. Thirdly, a diaphragm based valve will never have a stuck piston. Piston-based valves periodically incur stuck pistons (especially if the required maintenance schedules are not followed.) Due to the lack of a piston, the APR R1 solves this problem.
The R1 is designed for optimal performance. The main body of the valve is billet aluminum. As such, the APR R1 has much better flow characteristics than other diverter valves. Combined with the low friction diaphragm assembly, this equates to a valve that is truly a performance leader.
The materials used in the R1 are standard setting. 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. All machining and final assembly takes place at APR headquarters in the United States for optimal quality control and consistency.
- Diaphragm-Based Valve
- High-Temperature, Nomex-Reinforced Material for Extreme Durability
- No Sticky O-Rings to Maintain and Grease
- No Pistons to get Stuck
- Consistent Performance Year Round
- Flow-Optimized, Billet Aluminum Housing
- Stainless Steel Vacuum Fitting
- Zero-Maintenance Design
- Built with Finest Materials and Surface Treatments
- Fully Machined and Assembled at APR Headquarters in the United States for Optimal Quality Control
- The yellow spring included with the R1 DV is rated for 15-23 PSI
- Optional blue spring required for 23-30 PSI. (Blue springs are only needed for Stage 3 or higher.)
PLEASE NOTE: This upgrade is NOT designed as a drop in solution for newer engines with electronic diverter valves. This unit replaces the factory 710N DV.
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Free Shipping: Items marked as 'Free Shipping' may qualify for free standard ground shipping to the contiguous United States (48 states). Oversized products and direct ship products are excluded from this offer unless otherwise noted.
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APR's core philosophy of Innovation, Integrity, and Excellence aligns perfectly with E1 Motorsports core values. Our shared commitment to provide the highest quality and most highly engineered aftermarket performance products available for Porsche, Audi and Volkswagen vehicles.