Part Number: 23011-AT007

Description: HKS Short Block FA24 2.5L High Comp Step1 w/ Crank Key

Fitment: 22+ Subaru BRZ / 22+ Toyota GR86

Notes: Not for sale in California not CARB LEGAL

Details:

Highlights:

• Forged high-compression pistons enhance strength.

• Increased torque with high-strength I-beam connecting rods.

• Equipped with forged split connecting rods.

• Forged crankshaft ensures strength and reliable stroke.

• Uses highly durable connecting rod bearings.

The latest addition to our collection is the FA24 2.5L HIGH COMP short block. This versatile kit offers two options for NA and forced induction tuning, making it easier for you to experience the full potential of the stroker kit.

Piston Kit

• Uses high-temperature A2618 material to prevent second land breakage and eliminate the need for service holes.

• 2-layer molybdenum coating reduces friction.

• Piston head cavity optimizes direct injection atomization.

• 3D piston crown shape maintains tumble flow.

• Uneven piston head shape supports high-lift camshaft use.

Connecting Rod

• Exclusive conrods designed for longer stroke. The crank pin size is designed for a dedicated size. Thus it eliminates the modifications on the engine side.

• It optimizes the connecting rod bolt size and employs the high-strength split-type (not machined the cutting surface) I-beam.

Crankshaft

The crankshaft is made of a forged material and features a dedicated pin journal size. We highly recommend pairing it with the HKS connecting rod for optimal performance.

NOTE: HKS recommends using STEP 2 for a vehicle with a turbo that tends to be generated high torque.

HKS 2.5L Kit

• Bore: 94 mm 

• Stroke: 90.0 mm

• Displacement: 2,498 cc

Stock

• Bore: 94 mm

• Stroke: 86.0 mm

• Displacement: 2,387 cc