Supertech pistons are manufactured from extruded high silicon, enhanced 4032 alloy that low thermal expansion, excellent wear resistance and higher thermal conductivity. A phosphate dry lubricant coating is applied to pistons to protect against ring micro welding and enhance skirt lubrication.

Features

• Forged from enhanced 4032 alloy and CNC machined
• Contact reduction grooves are standard
• Honed & reamed pin bores and precise fit
• High tensile strength and evenly distributed hardness
• Withstands up to 42psi of turbo boost, w/alcohol, w/out any problems
• A 2 or 3 forging steps process yeilds a fine structural grain oriented in fibers in the same direction of the stresses.
• Wrist pins are constructed or cold extruded chrome molly steel for high strength to be used with the wire clip locks.
• Quality Control is performed after every step of the manufacturing process in climate controlled environments to ensure reliability of dimensions
• Wrist pins and wire locks are included.

Subaru WRX STi 2.5L Bore & Compression Ratio Options:

• 99.50mm (std) / 10.5cr
  Must be used with rings: SWF20068-0
• 99.50mm (std) / 8.2cr
  Must be used with rings: SWF20068-0
• 100mm (std) / 8.3cr
  Use with rings: SWF20068-2