2007~2015 Lowering Springs

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2009 Mazda CX-9 GT
Who's done it? Looking to see if there are any negative effects (vibration etc). I grabbed some H&R springs, but want to make sure there are no issues when lowering these rides.
 
There’s a few guys that have lowered on Ceika coil overs. Might want to ask them and see. I’d like to know too.
 
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