Winning performance describes the company and its products--Probe FPS forged pistons. These Factory Performance Series pistons are built with the power to handle your heavy-duty towing applications, as well as high performance street cars, trucks, or marine applications. Stronger than hypereutectic cast pistons, Probe FPS pistons are crafted from VMS-75 high-silicon, heat-treated aluminum using the same precision CNC-machining as their race pistons. FPS forged pistons feature reinforced piston skirts, radial anti-detonation grooves, pressure equalization channels, increased valve relief depth, offset wrist pins, and stock size ring grooves and press-fit pins. Increased power and fuel economy, reduced noise, and longer service time--all are part of the winning performance offered by Probe FPS forged pistons.