JOM kit is just a cheep suspension kit but you can adjust rude height and most people deck the car so proper most owners don't realise the extra understate the car has as a result as they won't have drivers the same car with a proper suspension set up

Until I fitted my HKS suspension I thought press under steer was a noticeable issue but it solved it with a few other things and the car is planted and jims old M3 had B10 suspension and handled well on track