We acquired an F500 unit for our vehicle. For simplicity's sake., F500 stands for 'up to 500hp'. The F300 is for up to 300hp, etc. We weren't anywhere close to 500hp with our Durango yet, but we have reached about 370+hp on nitrous, and therefore the F300 would have been too small a unit.The canister unit comes with all the hoses and fittings to plumb it inline on your fuel system. We started the install by threading on the two 90-degree fittings on each end of the canister.