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they eliminate flex for instant steering response and better shock control
plug‑and‑play upgrade
such as after shutdown for turbo cooling
Includes Dielectric Grease: Prevents moisture and corrosion on spark plug boots
Direct fit for multiple MK3 chassis vehicles
Pierburg Air Injection Pump 7.21851.31.0 cross-drilled they eliminate flex for instantThe Pierburg Air Injection Pump (part 7. 21851. 31. 0) is a secondary air injection pump designed to reduce cold start emissions on a wide range of Audi and Volkswagen vehicles from the 1990s through 2000s. It supplies extra air to the exhaust system to help the catalytic converter reach operating temperature faster, improving emissions performance and engine efficiency. This direct replacement pump matches OEM part 078906601M and ensures reliable
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