Kawasaki ZX-7R (1996-03) Flange-On Exhaust Systems: The stock header pipes on the Kawasaki ZX-7R are some of the trickiest pipes in production. With balance tubes and divider plates it would be difficult to produce a better set of head pipes for a reasonable amount of money. The key to more power lies in the muffler and Two Brothers Racing has it. Switching from stock to cool has never been easier. Re-jetting is not required.