The first thing most Kawasaki owners change is the exhaust system. The stock dual mufflers and incredibly heavy and do such a great job of reducing noise that they also reduce power. Slip on systems can easily drop lots of pounds from the ZX10 and allow easier stopping and acceleration. Full systems can drop weight and increase horsepower by 15+! Brock's Performance is our most popular exhaust for the Kawasaki ZX10 and the Alien Head muffler design makes great power with great looks.