HKS 21004-AT009 Piston Full Kit FA24 2.5L High Comp Step 2

Ideal capacity upgrade kit for increasing engine strength when installing a supercharger.

Piston Kit

• To prevent the breakage of the second land, the material employs A2618 material, which has high-temperature strength, to achieve a low pin height that eliminates the need for making any service holes.
• 2-layer molybdenum coated to help reduce friction.
• The cavity on the piston head optimizes the atomization of direct injection.
• 3D Piston crown shape sustains tumble flow.
• The uneven shape of the piston head allows using the high-lift camshaft.

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

• Crankshaft uses a forged material.
• It has a dedicated pin journal size. Combination use of the HKS connecting rod is recommended.

The kit includes:

• Forged piston kit
• Billet I-beam connecting rod
• Forged crankshaft.

Specification

HKS 2.5L KIT

Stock

Bore

94.0 mm

94.0 mm

Stroke

90.0 mm

86.0 mm

Displacement

2,498 cc

2,387cc

Compression Ratio with Stock Head

Gasket Thickness (mm)

Compression Ratio

0.6 (Stock)

12.2

0.8 mm (HKS Grommet Type)

11.8

1.2 mm (HKS Grommet Type)

11.3

Part numbers: 21004-AT009

Special order: imported to order. Contact us for price and availability.