PSR's extended ball joint for the Nissan Navara D40 Thai built models is a must when lifting your suspension. This model has a ball joint that presses into the arm from the top. During suspension articulation the upper arm comes into contact with the chassis and restricts full suspension downward travel/articulation and causes a knock. Using an extended ball joint allows your suspension to use its full travel by pushing the upper arm away from the chassis giving you the ability to lift the front end over 2 without the expense of aftermarket arms. Our replacement ball joints are supplied 35mm longer than OE, which when installed, allows exactly 35mm extra down travel at the wheel. Ball joints are a direct fit into the standard arms. Our ball joints are CNC machined and made in a hard to hard style so a long lasting quality product is supplied. Ball joint is greaseable and supplied in Black to blend into the factory arm.