Our aluminum bypass valve is a direct replacement for the plastic valve typically found on factory turbo cars from Saab, Audi, Porsche, and
VW. This valve is designed to hold more boost without leakage and also looks much better than the factory valve. It also has a higher flow
rate to better protect the turbo from surge situations. The kit comes with additional springs and a shim to adjust the opening pressure,
clamps, and vacuum hose.
These are also great for custom turbo builds that require a recirculated bypass system, or you can use this as a blow-off valve!
Here are the vacuum pressures required to open the valve with each spring:
Low 5”
Medium 8”
High 11”
Shim = 1.5” additional
This is an upgrade to the Bosch 0 280 142 102 diverter tube
