HKS 21003-AN010 Billet Piston Kit Capacity Upgrade - SR20DET 2.2L 1JZGTE 3.4L

The HKS 21003-AN010 is a high-performance billet piston kit designed for engine displacement upgrades on the SR20DET and 1JZGTE platforms. Unlike conventional forged piston kits, this billet unit is manufactured to exceptionally tight dimensional tolerances, allowing installation without boring or honing the cylinder block — making it an ideal solution for engine builders seeking a precision drop-in upgrade.

HKS engineers this kit as part of their Capacity Upgrade program, which increases engine displacement to unlock meaningful gains in torque across the low and mid RPM range — critical for both street performance and competition applications such as drifting and drag racing. All components are designed to work together as a matched system for reliable high-output engine builds.

Key Features:

• Billet aluminum piston construction — machined to HKS specifications for superior dimensional accuracy and strength
• No boring or honing required — precision fit allows installation into the existing cylinder block
• Displacement upgrade applications: SR20DET 2.0L → 2.2L and 1JZGTE 3.0L → 3.4L
• Complete kit includes piston rings, wrist pins, and retaining clips
• Engineered for use with HKS stroker crankshafts and connecting rods as part of a full capacity upgrade system
• Designed to increase engine displacement, torque output, and overall power potential
• Manufactured by HKS in Japan to strict quality and performance standards

The HKS 21003-AN010 billet piston kit is purpose-built for enthusiasts and engine builders looking to maximize the potential of the SR20DET or 1JZGTE engine through a precision displacement upgrade without the added machining costs typically associated with oversized pistons.