Blueprinted S16D Econo ProStock (EPS) Motor. This motor features a blueprinted set-up, matched magnets, tightened airgap and a legal Chinese S16D armature with cut comm., balanced & tweaked to 38 degrees timing. All EPS armatures are Pre-tested to meet EMMPS specs. The setup includes straightened can, soldered oilite, aligned and honed brush hoods and matched magnets. The motors include the above plus goldust brushes, champion springs and are fully tested