Supertech 99.5mm Bore / -20.5cc Dish / 8.2:1 CR Moly Coated Pistons – Set of 4 | Multiple Subaru Fitments (P4-SU9950-N20B-H13)

Subaru EJ25 Turbo DOHC Performance Pistons – Set of 4 by Supertech

Supertech Pistons are manufactured from extruded high silicone, enhanced 4032 alloy (with additional Cu, Ni & Mg) that had low thermal expansion, excellent wear resistance and higher thermal conductivity. Supertech Pistons, with this alloy, have withstood up to 42psi of boost, with alcohol, without any problems.

A two or three step forging process yields a fine structural grain which are then submitted to several machining steps in state of the art CNC machines. Several heat treatments provide the piston with high tensile strength and evenly distributed hardness.

Contact reduction grooves are standard, and pin bores are honed and reamed for precise fit. Wrist pins are constructed of cold extruded chrome moly steel for high strength and used with wire clip locks.

Finally, the pistons receive a ‘phosphate dry lubricant’ coating to protect the rings against ‘micro-welding’ and enhance lubrication on the skirt/cylinder area.

Features

• High silicone enhanced 4032 alloy (with additional Cu, Ni & Mg)
• High tensile strength and evenly distributed hardness
• Phosphate dry lubricant coating
• Undercut stem

Benefits

• Excellent wear resistance and higher thermal conductivity
• Enhanced lubrication on the skirt/cylinder area

Please Note: For use w/ Ring Set SWF-20068

Applications

• 20062014 Subaru WRX
• 20042021 Subaru WRX STi
• 20042013 Subaru Forester XT
• 20052012 Subaru Legacy GT
• 2005-2009 Subaru Outback XT
• 2004-2006 Subaru Baja Turbo
• 2006 SAAB 9-2X

What’s In The Box?

• 4 – Pistons

Warranty

• Due to the nature of the application, these parts are sold without any express warranty or any implied warranty of merchantability, or fitness for a particular purpose.