I put a performance tuned ECM and a high miliage low rpm clutck kit on my Ranger northstare crew ultimate. I also run 30 inch tires. My goal is to increase gas miliage and decrease noise. Clutch kit is smooth and power for hills is fine.it is much less noise.you sacrifice some snappiness but its worth it rpms are 1000 lower across the range. Havient tried performance mode yet as im breaking in a new belt. There is 20 more hp. In performance mode.