This kit took 7 days on the Dyno to develop; it has all the jets, springs, and needles to tune any modification at any altitude. The kit has recommendations for sea level to 5000 feet, and 5000 feet and above. We learned that the needles had to be much smaller and the springs had to be quite softer to create the correct vacuum pressure for the CV style carburetor. This was most evident with our air box and exhaust; the vehicle would not even start unless it was re-jetted. The air flow was so great on the intake side the slide would not open correctly. We saw 9 RWHP gain with Jetting and our ignition alone, with the vehicle reaching over 62 MPH! We added the intake and exhaust and saw another 7 RWHP. These are tremendous gains and require clutching to be able to handle the excessive power. DFR-4PC2 is recommended; if not required if you are going to add any performance modification to the Teryx Motor.
https://www.youtube.com/watch?v=-kWgoosbPlg&NR=1 Top Speed Run
https://www.youtube.com/watch?v=-kWgoosbPlg&NR=1 Fun Run