SLP's MTX™ Clutch Weights were designed specifically to harness the horsepower of today's high torque engines. Their unique heavy heel design and special weight profile provide substantially greater shift force which delivers much improved acceleration and top-end speed. This unique design allows the clutch to backshift very responsively. Adjustable by adding weight via rivets (up to 6 grams per weight), this weight offers precise tuning ability for your specific combination.**Sold per pair (2 weights), two sets required for operation.