The HKS 2.8L High Capacity STEP 3 Piston Upgrade Kit (21004-AN021) is the most aggressive and performance-focused stroker kit offered by HKS for the legendary RB26DETT engine found in the Nissan Skyline GT-R R32, R33, and R34. Designed for full-race and ultra-high output applications, this kit is built to handle extreme stress, sustained high RPMs, and massive power levels beyond 800+ horsepower.

STEP 3 features a fully counterweighted forged 86.0mm stroke crankshaft, lightweight forged pistons, and upgraded forged connecting rods engineered to withstand high cylinder pressures and prolonged racing conditions. Compared to STEP 1 and STEP 2, the STEP 3 kit prioritizes high-RPM response and durability in the most demanding motorsport environments.

Ideal for professional-grade time attack, drag, and circuit builds, this kit transforms the RB26 into a high-revving 2.8L powerhouse with brutal acceleration and response across the powerband.

• Engine Compatibility: Nissan RB26DETT (Skyline GT-R R32/R33/R34)
• Displacement: 2.8L (86.0mm stroke)
• Includes: High-strength forged pistons, forged H-beam connecting rods, forged full-counter crankshaft
• STEP 3 Design: For maximum high-RPM durability and racing performance
• Supports: 800+ HP with proper supporting mods and tuning

Note: Professional engine machining, balancing, and tuning are required. Not recommended for street use. Intended for full-race and high-load competition engines.