HKS 23011-AT010 Short Block FA24 2.5L H-Comp Step2 Closed-Deck

Description HKS 23011-AT010 Short Block FA24 2.5L H-Comp Step2 Closed-Deck

The HKS 23011-AT010 short block is a reinforced engine foundation based on the FA24 architecture, upgraded to 2.5L displacement through the HKS “High Comp STEP2” stroker kit and engineered with a closed-deck modification to withstand high combustion pressure typical of forced induction setups.

• Closed-deck conversion improves rigidity to suppress cylinder distortion under boost
• Deck surface is precision-polished to enhance sealing and flatness
• Honing process performed with a dummy head to improve cylinder roundness
• Main oil gallery is fully cleaned to mitigate contamination risk
• Piston oil jets added to reduce knocking tendency through enhanced cooling
• Forged A2618 alloy pistons offer high thermal strength with reduced mass (340g vs. stock 367g)
• Piston crown features a 3D profile with cavity design optimized for tumble flow and direct injection
• Custom I-beam connecting rods for STEP2 offer 30% greater strength than OEM with minimal weight increase
• Crankshaft is a specially designed forged unit for improved durability under high loads
• High-durability bearings used in the connecting rods

Specifications:

• Bore: 94.0 mm
• Stroke: 90.0 mm
• Displacement: 2,498 cc
• Piston: HKS Forged High-Compression
• Connecting Rod: HKS STEP2 High-Strength Machined I-Beam
• Crankshaft: HKS Forged
• Main Bearing: OEM
• Connecting Rod Bearing: ACL

• Recommended Oil: HKS Racing Pro 10W50
• Recommended Head Gaskets: HKS 23002-AT004 (0.8 mm), HKS 23002-AT005 (1.2 mm)