[stuff4mason]

Yes you should beef up the stock shocks. (G16's don't have leaf springs people)

Flip flop seats are heavy, then you add a couple of 150-200 people, now your talking an additional 400-500 lbs on the back. For your riders and the cart to be safe, you need the Jakes HD springs for the stock shocks.

And, its much easier to put them on before you install the seat.