The l-series is made very simple and to last for 500k miles if well maintained. It is factory underpowered in order to last even if severely neglected. I'm not saying it shouldn't be tuned for optimum performance but if you still want it to last then you should utilize it's higher torque and smooth power delivery but not push it to hard to often... As for the vags they are prone to melt a piston or two when pushed hard, none to mention the standard turbo if used melts fairly quickly... As for the pump it's true that the timing solenoid would die first...
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