on my cars and past cars no issue with mods. i only use high quality aftermarket bits and use the right tools to install. if the fitment is iffy i remove it from the car and just sell it locally and either leave that part stock, or find another brand/model.
my G is 10yrs old now with intake and lots of suspension bits, stereo,etc all aftermarket.
no issue.
one thing is to read and learn about it first before you do it.
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