Group of composite molded surprise pistons just for two shock absorbers with five 1.5mm holes & two 1.0mm holes. Two-way motion surprise pistons work in various ways if the piston travels up or down. With the plastic valve setup on piston, 2 holes are closed whenever piston travels upÂ… proper the piston travels down, the valve starts 2 additional holes therefore the oil moves through 7 holes in total. This setup enables perfect landings from jumps, despite having a soft surprise set-up. Made of specially-formulated Delrin composite product to provide smooth action & durability. Well-proven molding process guarantees perfect piston roundness after production, and so the pistons move totally within the shock systems for identical shock action in most four shocks.
