F30 BMW Dinan Progressive Bump Stops for N20/N26 engines, part #10457

Lowered F30s on N20 or N26 engines need proper bump stops - not just any rubber cone. These Dinan units (part #10457) are progressive-rate, designed to ramp up resistance as suspension travel compresses, preventing harsh bottoming and preserving control on UK B-roads or track days.

• Fit F30 328i, 330i, 320i with N20/N26 - not N55 or B48 chassis
• Stage 1 or fast road setups: pair with Eibach, H&R or Dinan springs for predictable compliance
• Track day use: maintains geometry under load, avoids premature contact with top mounts
• OEM plus intent: stiffer than stock but tuned for daily driver comfort, not show car stiffness
• Works with standard top mounts - no spacers or modifications needed

They’re not a magic fix for bad springs or worn dampers. But if your F30’s slamming over speed bumps or losing rear grip mid-corner, this is the right part - not a placeholder.