SPL is great! Is it over kill? Probably. But suspension no place to skimp. I’ve had no issues with hotschkis sways and spl end links on my x sedan. Over a year of aggressive driving on street and track. No issues relating to that in many many miles of abuse. Just my actual experience. I’d say it’s worth it. Ya it’s expensive but you won’t keep breaking them. Ask for them for Christmas so you don’t feel bad for how much overkill it is. Not sure there’s anything negative with spl parts other than price....takes suspension to next level forsure