AVO UK offer a kit for the X150, Quantum, also UK based offered a kit and Spires were working on a kit as well. There were a few Asian based companies with options. There’re some nice upgraded Bilstein kits for the X100 but sadly no interest from them for an X150 kit. Frankly anything aftermarket for the X150’s going to be rare, due to limited market and lack of interest there’s little to nothing available and I reckon at the rate the industry’s going it’s likely the X150 will end up dying off as parts become irreplaceable.

https://hiro-performance.com/06-14-j...PJA02-01-GO-RE

The benefit of BC kits for US buyers is their HQ’s in Florida and they offer numerous custom spring rate options.

 

I just started reading you posts regarding coilover setup as I tried my XKR with only Spires springs on track. After few laps I understood immediately what has to be done.
I already decided to go for BCracin (+purple powerflex) but now I don't understand you last post with link to Hiro coilovers, do you consider them better for track use (+occasional daily) or?

 

Was simply a reference to another company which offer a kit, as aftermarket for the X150’s quite limited.