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My results are below for the Sheridan Racing, Kick Ass Racing Components full exhaust on the ZX4RR.  The system can be purchased by contacting Brian Sheridan at bmhs1946@gmail.com.  It requires sending in your stock header and costs $675

Weight of the full system came in at 11 lbs 13 oz for a nice weight reduction from stock 8 lbs 2 oz

The below video has sound clips and full results or scroll past it to see the dyno results 

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First dyno run is comparing the stock bike to the Kick Ass System with my tuning ( not done same day).   Huge gains on top with no areas below the stock bike

This run shows DB killer in vs DB killer out,  it shows a couple HP reduction on top (runs done back to back)

Last run shows the Kick Ass system against the Graves low mount.  Both with my tune tested on the same day back to back.  There are several areas that the graves has an advantage and no areas that the kick ass is above the Graves but the Kick Ass system did perform well.