KYB 564004 MonoMax Gas Strut Maximum performance upgrade with up to 40% more damping performance than standard shock absorbers Perfect solution when you need to upgrade suspension performance on your Dodge truck Truck monotube design outperforms all other standard shock absorbers Zinc-coated, stainless steel piston ring provides a positive seal in the most extreme conditions Rubber boot to protect the shaft and keep dirt and debris away from the seals