APR R1 Diverter Valve | MK4 GTI · Jetta · GLI · MK1 Beetle · B5 Passat · A4 · S4 · C5 A6 · RS6 · MK1 TT | 1.8L Turbo I4 · 2.7L Turbo V6 · 4.2L Turbo V8 G20 M340i 3.0L Turbo I6 [B58] Massive 6" Inlet that organically

Massive 6" Inlet that organically necks down to 4"

Massive flow gains (45% over stock and 60% over stock with the APR Filter)

which puts a lot of stress on the mount brackets

Stock intake silicone adapter available

This design dramatically reduces the contact between the pin and cylinder

APR R1 Diverter Valve | MK4 GTI · Jetta · GLI · MK1 Beetle · B5 Passat · A4 · S4 · C5 A6 · RS6 · MK1 TT | 1.8L Turbo I4 · 2.7L Turbo V6 · 4.2L Turbo V8 G20 M340i 3.0L Turbo I6 [B58] Massive 6" Inlet that organicallyThe APR R1 Diverter Valve is a critical performance upgrade recommended at all stages of performance as it replaces the failure prone factory unit. The R1 is designed to withstand extreme boost pressures at the highest levels of performance, while offering lightning fast response thanks to the unit's friction free diaphragm based design. Unlike piston based units that can stick and bind in the winter, the APR R1 is virtually maintenance free,