Bilstein B8 Performance Plus Rear Damper for BMW E63 E64, Part No B14-1927

The Bilstein B8 Performance Plus rear damper (B14-1927) is what you fit when your E63 or E64 has been lowered on Eibach, H&R or KW springs - or when you’re building a fast road or track day car that needs predictable, linear rebound and controlled compression.

• Chassis-specific tune: valved for the E63/E64’s rear multi-link geometry and typical spring rates - not a generic ‘BMW’ damper
• Stage 1 & stage 2 compatible: works cleanly with stock springs, but shines with stiffer setups - no bottoming, no fade on track
• Monotube design: higher gas pressure, faster response than twin-tube units - critical for decat + remap combos where chassis control matters more
• Sold individually; fit in axle pairs - mismatched front/rear damping ruins balance, especially on an E63 with its long wheelbase and weight distribution
• No fitment notes needed: direct bolt-on to all E63/E64 models including M6 (S85), 630i (N52), 635i (N54/N55) and 640d (M57/N57)

Search terms this part actually matches: Bilstein B8 E63 rear, B14-1927 damper, E64 fast road suspension, track day rear shock E63, Bilstein B8 for S85 M6, decatted E63 rear damper.