1 SET IC9920.STD/1 SET 4250AM8.STD

Icon's FHR (Formed Head Relief) pistons deliver quality on a budget. FHR pistons have valve reliefs that are formed into the piston as the forging blank is pressed into the die. Many of the FHR dome pistons feature a solid dome, giving engine builders the flexibility to machine the dome to their desired compression ratio. FHR pistons are 11% silicon, which means they can be installed with tighter piston to wall clearance. In addition, the use of 4032 aluminum decreases the friction created during engine operation, resulting in extended piston life and reduced wear. Features include mini grooves that allow an overheated piston to transfer heat to the wall, skirts machined by UEM's unique in-house built CNC machines, die-formed relief valves, and an accumulator groove to help eliminate flutter and maximize ring seal. Wrist pins and spiral locks are included. Note: Rings are not included.