As seen on Ahmad Daham's Drift RCF, a true Coilover conversion from divorced spring and coil when stock. Exclusively developed by FIGS with BC Racing.

https://www.lexus.ae/about-us/lexus-x-ad24/

The Ultimate in driver feel for the track and spirited drivers, the DS series delivers that edge for novices and serious competitors alike.  If you prefer the instant response of a stiffer suspension but not necessarily the jarring impact of bumps at speed, the proprietary digressive piston design might be what you are looking for.  A common feature on high-end racing shocks, Digressive valving allows a low-speed roll resistance like adding a stiffer sway bar, but falls back into a linear fell for the bigger bumps and dips in the road or when pitched over in a corner.  DS deliver a great intersection between a single adjust and dual adjust ER series with a more performance feel without the tuning involved. 

General specs:

• Mono-Tube Shock (Rebuildable) design.
• 30 way adjustable damping control (compression/ rebound) via knurled knob on top of shock.
• Digressive valving adds to driver feel with firmer intial feedback and compression which tapers off as force is applied.  Perfect for track cars.
• Optional Pillowball or rubber upper mounts. Rubber mounts offer a lower noise ride while Pillowball offer precision handling.
• Separate ride height adjustment means that you do not need to change spring preload to adjust vehicle ride height.
• Springs rates are specified below but can be customer specified as well. Large steps in spring rate will also include the proper valving. Allow 1-2weeks for revalving of custom orders.

Technical Specs:

• Digressive valve design for higher initial damping feel.
• 46mm Pistons over 53mm shock housings providing a large range of damping force capabilities.
  
• Special spring-steel valves outperform other stainless steels and offer prolonged valve life.
• Patented concave lower locking ring to prevent unseating
• Springs constructed of SAE9254 High Strength steel that is compression tested over 500,000 with less than 5% deformation.
• Pistons are high polished steel to lengthen oil seal life which means no leaking and longer seal life.
• High-pressure inner rod guide seals ensure a perfect fitment resulting in consistent fade-resistant damping and long seal life.
• 2-Step coating process utilizing nickel and chromium plating to prevent corrosion.
• Newly developed lubricant oil in all shock cartridges minimizes aeration/foaming and cavitation.

SWIFT Metric Coilover Springs are highly linear, with fewer winding springs that reduce unsprung weight and increase performance.