SUPERTECH 12.5 CR 86mm PISTONS HONDA CIVIC SI ACURA RSX TYPE S K20 K20A2 K20Z1 K20Z3 P4-HK86-P15
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.
- Fits 2002-2004 Acura RSX Type-S 2.0L (K20A2 engine)
- Fits 2005-2006 Acura RSX Type-S 2.0L (K20Z1 engine)
- Fits 2006-2011 Honda Civic Si 2.0L (K20Z3 engine)
- 12.5:1 Compression Ratio
- 86mm Bore
- 3.386" Stroke
- 5.472" Rod
- 1.181" (30mm) C/D
- 50.7 Head CCs
- 14.8 Volume CCs
- 295 Gram Weight
- .866" (22mm) Pin Diameter
Includes pistons, rings, wrist pins and locks
For Use with All-Motor / Naturally Aspirated (N/A) and Nitrous
Recommended to use with forged/upgraded connecting rods