For the 2019 Indian Chieftain its 4 10mm bolts to remove the headlamp and another 4 small philips screws to remove the retaining ring. Takes maybe 10-15 min total. At 3800 Lumens these are just slightly less than the Vision X at 4200 lumens. But Vision X is also $400 and rated the best by many motorcycle and headlight reviewers. This is a $200 headlight and it is much brighter than the stock halogen or even an upgraded blue light halogen. While brighter I didnt particulary feel the side vision is as wide as I would prefer. Same with its down the road vision. This may be overcome with additional adjustments from the head light unit in the housing. For the 2019 Indian Chieftain, making sure you get the one with the H4 adapter is important. Overall, very happy. Check for discounts. A week before I bought mine they were on sale for 149 but didn't have the funds to buynow.Additionally, Custom Dynamics sells an adapter for the unit to keep your low and halo on while using high beams. This is pretty useful when out on a dark widing road in the middle of the night.