Race-Driven High Quality Hydraulic Struts. You will receive 2 front hydraulic struts to fit the following models: 1990 1991 1992 Polaris Trail Boss 350L 2x4 / 1990 1991 1992 Polaris Trail Boss 350L 4x4. Replace your stock OEM hydraulic struts for a fraction of the price. Engineered and built with the exact dimensions of OEM to meet or exceed original quality standards and to give longer lasting performance. This is a huge upgrade for your front suspension. Race-Driven is an industry leader in quality aftermarket parts. Race-Driven is committed to bringing the highest quality products to all riders at an affordable price. Customer Driven – Quality Driven – Race-Driven.