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The newest version of the pump definitely makes more noise than the first generation. It's a mechanical clicking type noise that rises and falls based on throttle inputs. It's normal and eventually it just fades into the background as your rpm's climb.. The newer version was able to max out my OEM injectors quite easily on E50 with my DAW UF turbo. Rail pressure has been rock solid throughout the entire rev range. I can't recommend this product enough if you are looking to significantly improve your fueling levels for a larger turbo.
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