15% secondary for standard 420 Rancher (foot-shift or regular ES no auto), 2005-2011 Foreman 500 (foot-shift and regular ES) and 2017+ Pioneer 500/520. This gear set makes 12% in 2012+ 500/520 Foreman/Rubicon IRS and 15'-16' Pioneer 500. Some internal clearance/cutting is required and models with speedometer will require VSS(speed sensor) modification by installer or use our modded sensors found in the "Parts" section. Check our install guide page or send us a message for more details.
**ES models including Pioneer will need an ES module to prevent electronic shift issues. The ES modules and rear seal kits are listed in the 420/500/520 section's and also located in the "Parts" section of the site. Pic is for example only and may not show correct size.