I've put gold valves and springs in my suspension, Galfer stainless lines,and aftermarket pads. The improvement in handling far exceeds the bang for the buck that the 3 or 4 extra hp that you get from a slip-on at 10,500 RPM. Most slip-ons don't do anything but make more noise, especially if you don't rejet or retune. I use stock exhaust w/K&N filter, the mods listed above, and a razor tune. If you're not going to rejet/retune, just poke a few holes in your muffler, you'll get similar results and save $500.00 US:drum:
