Bilstein Shock Numbering System
Example: SN 7 A 20 40
- 7 - Stroke in inches (Comp. length subtracted from Ext. length)
- A - Aluminum threaded body shock
- 20 - # Rebound damping (first # in sequence)
- 40 - # Compression damping (second # in sequence)
Note: Rebound and Compression are expressed in the industry standard, 4, 5, 6 etc. with a 2nd digit to allow for a degree of dampening between whole numbers. For example: 50 means 5, 55 means 5-1/2