Wiseco KE163M8675AP Forged Piston Set Opel Vauxhall C20XE 86.75mm Bore 12.5:1

The Wiseco KE163M8675AP is a Professional Series forged piston set designed for the Opel/Vauxhall C20XE 2.0L 16-valve engine. This kit includes four forged pistons machined to an 86.75mm bore diameter (0.75mm oversize) with a 12.5:1 compression ratio and a +5.2cc dome volume, making it an ideal choice for high-performance and race engine builds.

Each piston is engineered and forged in the USA from 2618 aerospace-grade aluminum, a process that compresses the material's molecules to increase density and align the grain flow — resulting in superior impact resistance, fatigue strength, and ductility compared to cast alternatives.

Key Features:

• Bore: 86.75mm (0.75mm oversize)
• Compression Height: 30.49mm
• Pin Diameter: 0.827 in. (21.0mm)
• Compression Ratio: 12.5:1
• Dome Volume: +5.2cc
• Ring Part No.: 8675XX
• ArmorGlide® Skirt Coating: Anti-friction coating minimizes scuffing during break-in and reduces friction on cylinder walls
• Armor Plating Crown Coating: Abrasion-resistant plating that raises aluminum hardness, increases ring groove durability, prevents micro-welding of piston rings, reduces carbon buildup, and combats detonation-related corrosion
• 4-Valve Pocket (4VP) Design: Optimized for the C20XE's 16-valve cylinder head
• Offset wrist pins for quieter operation, matching OEM design intent
• Kit includes pistons, premium rings, gudgeon pins, and wire locks

Compatible with the Opel/Vauxhall C20XE engine as found in the Astra, Vectra, and Calibra 2.0L 16V platforms (engine displacement: 1998cc, 16 valves, OEM compression ratio: 10.5:1). These pistons are built to withstand the demands of heavy to severe duty race builds, making them a go-to solution for builders looking to push the C20XE beyond its stock limits.