This is a pack of RPM Rear A-Arms for the Traxxas Nitro Slash. The Stock Traxxas Nitro Slash rear A-arms are designed to fit multiple vehicles. Because of that, they have several unnecessary holes that aren’t used on the Nitro Slash. This creates many weak points where the A-arm can potentially break. RPM rear A-arms for the Traxxas Nitro Slash are designed with only the necessary holes and nothing more, for an exclusive fit on the Nitro Slash with clean looks. By eliminating all of those unneeded holes, not only do you get increased strength and durability, but they are also nearly 20% lighter! That’s right, the RPM Nitro Slash rear A-arms are stronger, lighter and more durable than the stock parts! Each pair of RPM Nitro Slash A-arms is molded in RPM's trademark blend of incredibly strong nylons right here in the USA.