HKS 2.1L High Compression FA20 Stroker Replacement Pistons 2013-2021 BRZ / 2013-2016 FRS / 2017-2021 86

Here, you are looking at the HKS 2.1L FA20 Stroker Kit Replacement Piston Kit 2013-2021 BRZ/ FRS/86. 

This kit is only to be used as a replacement for the pistons found in the 21004-AT002 stroker kit and is not suitable for use with rods/crank outside of the HKS 2.1L Capacity upgrade.

Piston Kit details:

• Carefully selected specially forged raw materials used

• Replacing the head gasket enables both NA and Forced Induction applications

• In order to meet high power requirements, the compression ratio was optimized through strength analysis and testing, allowing for flexibility in the setup, and the use of high boost levels. 

• The piston crown had 3D design in consideration of the stock direct injection system

• The short-height piston design eliminates potential issues caused by overhang from the piston skirts

• Friction, weight, and other design properties were all taken into account to suit the needs of the short height pistons

Stock Bore Compatibility: 

• To maintain block strength, this kit retains the factory 86mm piston bore

• No need for boring, honing, or sleeves makes this a cost-effective install