I can speak to the use of the B6 struts with different springs. I have upgraded the suspension on every LX I’ve owned so far, replacing their stock shocks and struts with Bilstein B6s and their stock springs with either those from an SRT, one of the Eibach lowering models, or Mopar Stage 1s. (My 2011 Challenger even got SRT springs from a 2012 model.).
I have had no issues using the B6s with any of the lowering springs or the SRT springs. I’m currently running them with a set of Eibach Sportlines on my Charger, and I literally put them to the test today during a 41 minute drive to another town (beat my personal best time of 44 min!). That road is a two lane farm to market road with dips and corners that make the stock suspension weak in the knees. My Bilstein+Sportline suspension shrugged it of and asked, “is that all you got?”
I have had no issues using the B6s with any of the lowering springs or the SRT springs. I’m currently running them with a set of Eibach Sportlines on my Charger, and I literally put them to the test today during a 41 minute drive to another town (beat my personal best time of 44 min!). That road is a two lane farm to market road with dips and corners that make the stock suspension weak in the knees. My Bilstein+Sportline suspension shrugged it of and asked, “is that all you got?”
