BMW 440i - Dinan Supplemental Ride Quality & Handling Kit (2016-2020). Purpose-built bump stops engineered to pair with Dinan Performance Spring Sets, refining ride quality and control on lowered 440i models.

By maximizing usable compression travel, this kit helps prevent harsh bottoming while keeping the chassis composed over uneven pavement. The progressive design also optimizes effective spring rate under load, delivering improved mechanical grip and predictable cornering without sacrificing daily comfort. Built from OE-quality materials and tuned specifically by Dinan, it integrates properly with your existing Dinan springs.

Features

• Tuned, progressive-rate bump stops matched to Dinan springs
• Maximizes compression travel on lowered vehicles
• Reduces bottoming for consistent control
• OE-quality materials for durability
• Install time when done alone: 7.8 hrs (RWD), 8.2 hrs (xDrive)
• Negligible labor when installed with the corresponding Dinan Spring Set

Questions or planning an install? Call Austin, TX at 512-982-9393 or our Los Angeles, CA area shop at 562-981-6800. We offer installation and customization at both locations.

Buying multiple items? Contact us for shipping discounts. We install on premises at both locations.

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