I always liked the Junior Johnson Fuel Line - it wound around in loops so that he could get in an extra gallon of gas.
I like the ingenious ways of getting nitrous tanks in there. Ya know somebody's got some huevos to run nitrous through some of the places they run it. Talk about fiery crash deaths!
I used ta have a little Dodge that Dennis put a nitrous set up in....... *sigh* I liked it... sometimes I think I might like to have a setup on my bike.... and then again.... two wheels...