Upgraded Spring for Factory Audi External Wastegates 034Motorsport Audi Wastegate Spring - 1.9 bar Absolute Pressure Upgraded Spring for Factory Audi External Wastegates Designed to Increase Mechanical Base Boost Pressure The 034Motorsport wastegate spring replaces the factory spring in classic Audi external wastegates. It increases mechanical base boost pressure and helps resist premature wastegate opening. Technical Specifications: Manufacturer Part Number: 034-145-6001 Pressure Rating: 1.9 bar absolute Equivalent to approximately 0.9 bar gauge boost pressure or 13.5 psi Application: Factory Audi external wastegates, 1980 to mid-1995 Included: 1 wastegate spring. Note: The 1.9 bar rating refers to absolute pressure, not gauge boost pressure. Engine calibration and boost control must be compatible with the increased base boost pressure.