What is the primary benefit of using forged pistons like these?

Forged pistons are significantly stronger and more durable than cast pistons. This strength allows them to withstand the higher cylinder pressures and temperatures found in high-performance, high-compression engines without deforming or failing.

What does 'HR' and 'HC' mean in the product description?

HR stands for High Resistance, indicating the pistons are built to endure higher cylinder pressures and heat. HC stands for High Compression, meaning the piston dome is shaped to achieve a higher compression ratio, which generally leads to more power.

What is included in this 'Full Kit'?

A full piston kit typically includes the pistons themselves, piston rings, wrist pins, and pin locks. This ensures all the necessary components for a complete piston installation are provided as a matched set.

HKS RB26 2.8L HR HC 86.5mm Piston Kit 21004-AN025

Name: HKS BCD PISTON FULL KIT RB26 2.8L HR HC 86.5
Brand: HKS
SKU: hks-hks-bcd-piston-full-kit-rb26-2-8l-hr-hc-86-5-t14-894266
Price: 23006.72 USD
Availability: BackOrder

HKS BCD PISTON FULL KIT RB26 2.8L HR HC 86.5

$23006.72

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

HKS BCD PISTON FULL KIT RB26 2.8L HR HC 86.5

Key Features

Fits RB26 engine builds targeting 2.8L displacement.
Features 86.5mm bore pistons with High Resistance (HR) and High Compression (HC) specifications.
Constructed from forged high-strength aluminum alloy for durability under extreme conditions.
Designed to withstand high cylinder pressures and temperatures common in performance builds.
Includes all necessary components for a complete piston installation.
Not CARB approved; cannot ship to California.

This piston kit is designed for the RB26 engine when modified to 2.8L displacement with specific HR and HC specifications. Please consult manufacturer fitment data to confirm compatibility with your specific engine build.

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Product Details

This is the HKS BCD Piston Full Kit, specifically designed for the RB26 engine when building it out to a 2.8L displacement with High Resistance (HR) and High Compression (HC) specifications, using 86.5mm bore pistons. This kit represents a significant upgrade for enthusiasts looking to push the performance limits of their RB26 engine, often found in iconic performance vehicles.

The pistons in this kit are forged from high-strength aluminum alloy, a material chosen for its excellent strength-to-weight ratio. This means they can withstand the extreme pressures and temperatures generated in a high-performance, high-compression engine build without deforming or failing. The 86.5mm bore size is crucial for achieving the 2.8L displacement when combined with the appropriate crankshaft and connecting rods. HKS has engineered these pistons with specific dome shapes and compression ratios (HC) to maximize power output while maintaining reliability under demanding conditions. The High Resistance (HR) aspect refers to their ability to endure higher cylinder pressures and heat, making them suitable for aggressive tuning and track use.

This full kit includes everything needed to install the pistons, ensuring a cohesive and properly matched set for optimal engine performance and longevity. It's important to note that this kit is not CARB approved and cannot be shipped to California. For builders aiming for a robust and powerful RB26 2.8L engine, this HKS piston kit offers a well-built foundation.