The TORQ Locker is the most advanced, strongest, highest quality automatic locking differential on the planet, proven in the most extreme vehicles from hard-core Rock Crawling, racing the King of the Hammers, Rock Bouncing, Sand Dunes and Mud Drags. To back this all up, Torq-Masters Industries offers an unprecedented 4 year warranty on the TORQ Locker with no tire size, horsepower limits or loopholes. Torq-Masters Industries is committed to building the highest quality locking differentials possible. To be the best, we build with the best, TORQ Locker is 100 percent Made in the USA with 100 percent USA raw materials. Torq-Masters team of engineers make every effort to ensure that the model fitment listed is accurate. However, due to vehicle manufacturers differential options, using available inventory, prior vehicle owner modifications, etc. it is the customers responsibility to confirm that the model TORQ Locker they order fits their differential. All TORQ Lockers are designed for installation in an open differential. Fits 2015-2021 Honda Pioneer 500, every model. Fits 2021+ Honda Pioneer 520, every model. Fits 2014-2021 Honda Pioneer 700, every model. The 700 comes with a factory locking option external to the differential. In case of failure, or for a more robust differential the TORQ Locker can be installed. Fits 2009-2013 Honda 700 MUV Big Red, every model. The 700 comes with a factory locking option external to the differential. In case of failure, or for a more robust differential the TORQ Locker can be installed.