[kenikh]

There is really no downside - it is simpler. Tuning takes some time, but as long as you can handle a lptop it is simple enough. You can keep using the stock airbox if you like and I prefer the stock look actually. It gets rid of all of the other weird bits like Warm up Regulator and fuel distributor since you are shooting fuel from a rail directly into the runners. I say do it - if your CIS is a disaster, it willa ctually be cheaper to do the Bitz kit than fix the CIS. And to be clear, you should expect BETTER, not worse fuel economy.