Fox themselves have not confirmed fitment of their coilovers or shocks on the 2021 F150s at all, and while Roush states that lowering the ride height on the coilovers a bit will allow a fit on the 2021 F150s, adjusting these coilovers is a lot easier said than done. Secondly, it's very likely at this point that Fox will be coming out with new part numbers for the 2021 F150s (though we don't have an outright ETA). Thirdly, the UCAs included in this package will not fit a 2021 F150. Grimm OffRoad will have 2021-specific UCAs out here in the near future.