The first thing to think about when wanting to improve shifting should be consideration of the cables. Cables are often overlooked and can make a big difference at a relatively low cost.
At first glance, the Yokozuna cables seem like an ordinary steel cable, but upon further research of the technology and production process, you get an understanding of this outstanding product and why they are many professionals best kept secret.
The cornerstone of these cables are the raw materials - Yokozuna uses the best stainless steel, then applies their proprietary 'die-drawn' process to produce the strands. These strands are then woven so tight, the cables are virtually stretch-free. With all the hullabaloo about having your cables Teflon coated, no one ever seems to talk about cable stretch and distortion.
No stretch = better performance, it's a simple as that.
Almost guaranteed to improve any shifting system, they can be used with either stock OEM housing or Yokozuna housing. Choose from Shimano/SRAM or Campagnolo.