Getting just the trailing arm and upper link are good enough to shorten the wheelbase. All other parts from the spare parts bin for my slash. Complete Parts List - This is truly a budget build if you already own a yeti. All parts listed in USDProline 2740 slash protrac Scte Wheels - $8
Proline 2734 Slash Wheels - $8
A set of 4 Proline Trencher M3 - $50
Proline Ford Body - $30
Tamiya Paints Blue and Silver - $14
Red Bull 1/10 Shortcourse Decals - $20
Wraith Upper links Set - $10
Twin Hammer Trailing Arms - $10
Spider Gears and pin to Unlock rear diff - $10