Time and money, ehh hard to say, cause i did alot of crap that wasn't needed, bought better parts then what they said to used also. Mine took me about 3 days BUT the actual time would have been roughly 45 mins, if i wouldn't had to ask for help on location of parts and also have kids hollar for me and wife needing help with house work. My money tied up into it, again, i bought better parts, BUT just for the instructions alone was a freaking 100 dollars then they were to hard to read so i bought a basic kit for 189. Its really funny now though, cause my neighbor installed his on his f150 after i installed mine for a while on the 93 Explorer, right before i did mine, Christian did his Honda, we've all got different amounts of gain, but all drive way differently to. my total cost was roughly 300-315, time 45 mins - 1 hour, my gain 4/9 city/hwy, but i don't wanna sound like an advertiser, so get a hold of me if you wanna know more.