The "SumoSprings SSR-339-47-2"

is a specific product designed for a Mercedes-Benz Sprinter 3500 4WD vehicle. These are auxiliary suspension springs or bump stops that are installed to provide additional support and help with load leveling for your vehicle.

Please note that these types of products are typically installed to improve the vehicle's suspension performance and load-carrying capacity. If you have any specific questions about the SumoSprings SSR-339-47-2 or need assistance with installation or product details, it's advisable to consult the manufacturer's documentation or contact their customer support for the most accurate and up-to-date information.

Rear SumoSprings

are a maintenance-free suspension enhancement built to create a better journey.
Handmade from micro-cellular polyurethane, they are designed to reduce rear-end sag and increase load carrying ability while decreasing vibration, stabilizing sway, and softening harsh rebounds. 

The SSR-339-47-2 

has a 5,000 lb capacity when compressed at 50%.
The Black SumoSprings shouldn’t be compressed past 65% of their original height in order to keep full memory rebound.