Painless Performance 10102: Wiring Harness, 21-Circuit, Dash Ignition, Front Fuse Block, Spade Fuse, Extra Long Harness, Universal, Kit - Painless Performance 21-circuit universal harnesses cover most basic wiring needs for nearly any vehicle. They have plenty of length for full-size and muscle cars. Whether you're working on a hot rod, street rod, muscle, or classic car Painless has you covered.