Any increase in horsepower leads to more wear... So you can't specifically blame the meth for that. However, keeping your AIr/fuel ratio down is beneficial to the reliability of your engine.
Should probably look into some engine management mods as well.
I had a meth kit on my last car. I had some issues with the reservoir leaking but that's an install issue. Also, if you're running a more aggressive tune, make sure not to run out of meth when your pushing the motor
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