These A-arms are everything you’ve come to expect from RPM, designed to be stronger than stock and built to tighter tolerances, making critical suspension settings much easier to lock down. The RPM A-arms feature angled leading and trailing edges which are more aerodynamic and allow the A-arms to transition up and over objects much more easily. Bosses have been added around the hinge pins as well, reducing the possibility that a big hit will stretch the hinge pin holes. The outerhinge pin locking screw has been updated with an in-line screw. This helps improve overall A-arm strength while keeping the outer hinge pin locked solidly in place.All RPM A-arms are designed from our incredibly tough blend of engineering grade nylons and are backed by our limited lifetime warranty against breakage. You can’t go wrong with RPM!