HKS Short Block FA24 2.5L High Comp Step2 w/ Crank Key (23011-AT008)

Constructed from high-temperature A2618 material, this design prevents second land breakage and removes the need for service holes. A two-layer molybdenum coating minimizes friction, while the piston head cavity enhances direct injection atomization. The 3D piston crown shape preserves tumble flow, and the uneven piston head design accommodates high-lift camshafts. The Step 2 engine delivers enhanced performance and durability, specifically for turbocharged applications. Application Subaru BRZ / Toyota GR86 (2022+) Features CNC Machined Combustion Chamber  Strengthened main bearings & connecting rod bearings High angle camshaft Reinforced valve springs