Description
Supertech 87.5mm Bore 12.5:1 Compression Pistons for Acura/Honda K-Series Engines
- Manufactured from extruded high silicon, enhanced 4032 alloy (with additional Cu, Ni & Mg) that has low thermal expansion and features excellent wear resistance.
- Withstood up to 42psi of turbo boost with alcohol, without any problems.
- 2 or 3 step forging process that yields a fine structural grain orienting the fibers in the same direction of the stress.
- Several heat treatments for an evenly distributed hardness and extremely high tensile strength.
- Goes through several machining steps specifically designed to ensure dimensional precision, perpendicularity and flatness of the ring grooves.
- Reduction grooves
- Honed and reamed pin bores for the most precise fit
- Wrist pins are constructed of cold extruded chrome moly steel for high strength to be used with wire clip locks
- Bore: 87.50mm[0.50mm+ Oversized]
- Comp Height: 1.181″ (30mm)
- Comp Ratio: 12.5:1
- Dome/Dish Volume CCs: 4
- Pin Diameter: 22mm (.866″)
- Pin Weight: 76grams
- Piston Weight: 315grams
- Rod Length: 5.984″
- Skirt Style: Slipper Style
- Stroke: 3.897″
Note: Piston Ring Not Included
