Gabriel Ultra shocks are high-tech twin tube high pressure gas shocks that incorporates G-Force technology to provide superior ride quality, enhanced driver control, and increased maximum shock operation. Whether driving a performance car or hauling your boat or camper, these high-quality shocks are more than up to the challenge. Gabriel G63683 Ultra shock absorbers are precision engineered shocks that have drawn on Gabriel's 100 years of experience producing shocks, as Gabriel is the company that invented the original shock absorber in 1907.