Always quick to develop new product, Yoshimura has already released a full performance exhaust system for the little Z. The new RS-2 Mini exhaust system completely replaced the stock “under-performing” exhaust system and retails for $499. According to Yosh, the pipe boosts torque and horsepower and is bound to add sound to the equation as well. As an added bonus, the carbon-and-stainless system is said to be three pounds lighter than the stock system. That doesn’t sound like much, but when Kawasaki is claiming just 225 pounds for a fully fueled Z, that works out to a weight savings of 1.3 percent. Oh wait, that really isn’t very much!