Designed to provide increased stability required by more powerful and heavier vehicles, the KYB MonoMax Truck Shock Absorbers and Struts are engineered based on the principles that have paved the way for KYB Gas-A-Just shock absorbers to gain worldwide recognition for quality engineering, maximum ride control, and superior durability. But what sets them apart from the Gas-A-Just is that they combined the monotube high pressure design with a 1/2" diameter hardened piston rod and a large diameter piston to meet the increasing demands of most popular pickup trucks, SUVs, and 4WDs. Their piston rings are made using premium stainless steel and coated with a zinc finish to provide a positive seal even in the most extreme conditions. Their ultra-smooth piston rods are also chrome plated to minimize seal wear, and they use only a multi-lip, synthetic oil seal that helps keep fluid in and a wiper that prevents oil contamination. Rubber boots play a critical role in these assemblies too as they offer excellent shaft and seal protection. With all these great components used in manufacturing the KYB MonoMax shocks and struts, what else would you need? Get the KYB MonoMax Truck Shock Absorbers and Struts for enhanced performance, durability, and high performance control for your hardworking vehicle today.