Sulastic is a suspension system designed to improve a vehicle's ride quality and handling, particularly in pick-up trucks and heavy-duty vehicles. The key component of the Sulastic suspension system is the Sulastic shackle, which replaces the traditional leaf spring shackle found in many suspension systems.

The primary purpose of the Sulastic suspension system is to reduce the transmission of road vibrations and shocks to the vehicle chassis and cabin. This helps provide occupants with a smoother and more comfortable ride and reduces wear and tear on the vehicle’s components.

The Sulastic shackle typically consists of a central pivot point with elastomeric elements on either side. These elastomeric elements act as shock absorbers and allow for a certain degree of movement and flexibility in the suspension system, improving the vehicle's ability to absorb road imperfections and providing a more controlled and comfortable ride. 

Sulastic suspensions are often used in pick-up, heavy-duty trucks, RVs, and other commercial vehicles where ride comfort is important. They help reduce driver fatigue and improve overall vehicle stability. 

FEATURES & BENEFITS: 

• Reduce Vibration and Shocks 60-80%
• Improve Stability 20-30%
• Reduce Braking Distance 10-20%
• Stops the Bed Bouncing
• Reduce the impact harshness over potholes & broken pavement
• The joints at the concrete roads produce picky noise, this noise is gone when you install the sulastic.
• Smooth out the ride by just replacing the OEM shackles.
• Load and towing Capacity Not Affected
• Improves Handling and Control of the Vehicle
• Quality ride improvement in rainy, cold & hot weather
• Requires no maintenance.
• Set includes 2 sulastic shackles per axle.
  

Installed on	Rear Axle with Leaf-Spring Suspension
Part(s) Replaced	OEM Shackle
Kit or Single Part	Kit per axle
Installation type	Screw-on (Some applications may require modifications to the vehicle)
Installation time. (Estimated with all pieces, tools, and experienced installers)	1-2 Hours
Truck’s Height Modification	Keeps the height between ¼”
Truck’s Load Capacities Modification	None

This part fits:

 - 1998-2016 F-SERIES 
 - 2011+ GM 2500/3500HD