The HKS Capacity Upgrade Kit 21004-AT001 is a high-performance stroker kit designed for the Toyota 2JZ-GTE engine, increasing its displacement to 3.4 liters. This kit is engineered to enhance engine durability and support power outputs up to approximately 1,000 horsepower.

Key Components:

• Forged Aluminum Pistons: These pistons feature nickel plating on the top side and top land groove, enhancing durability against knock and high combustion pressures. They also include molybdenum coating to reduce friction.

• H-Beam Connecting Rods: Designed for high strength, these rods support the increased stroke and improve torque in the low to mid-speed range.
  
• Billet Crankshaft: Manufactured from special forged materials, this high-strength crankshaft features a 94.0mm stroke and a lightweight, counterweighted design to improve engine response.

Additional modifications:

 • 1mm over sized pistons requires cylinder bore and honing

 • Recess modification inside the engine block is not required. 

Specifications