HKS 2.8L BCD Piston Full Kit Step 2 87mm RB26DETT GT-R 21004-AN022

Vehicle Fitment

• Nissan Skyline GT-R BNR32 / BCNR33 / BNR34 (RB26DETT)

Fitment Notes

• Full engine capacity upgrade kit - a complete engine build/rebuild is required for installation
• Not CARB legal; not for sale or street use in California

Features

• Builds on HKS's long-standing Step 2 2.8L capacity upgrade stroker kit platform, now upgraded with modern Bridge Concept Design (BCD) pistons
• BCD pistons use advanced materials and refined engineering for superior strength and durability over previous-generation pistons
• 87mm bore increases displacement from the stock 2.6L to 2.8L for a meaningful gain in torque and overall power potential
• Designed to work alongside other HKS RB26 build components (cam gears, oil pump, timing belt) for a complete engine upgrade

Specifications

• Displacement: 2.8L (Step 2)
• Bore: 87mm
• Piston Technology: BCD (Bridge Concept Design)

Included Components

• Full Piston Kit (pistons, rings, pins, and related hardware for a complete set)

Product Description

The HKS 21004-AN022 is a 2.8L Step 2 capacity upgrade piston kit for the Nissan Skyline GT-R's RB26DETT engine, featuring an 87mm bore and HKS's newly developed BCD (Bridge Concept Design) pistons. Building on the proven Step 2 stroker platform that's been a mainstay of serious RB26 builds, the BCD pistons use more advanced materials and engineering to improve on the strength and reliability of earlier piston generations.

Stepping the engine up to 2.8L of displacement delivers a meaningful increase in torque and overall power ceiling over the stock 2.6L configuration, making this kit a common foundation for high-horsepower RB26 builds. As a full engine internals upgrade, installation requires a complete engine teardown and rebuild, and pairs well with complementary HKS components like cam gears, an upgraded oil pump, and a reinforced timing belt for a cohesive build.