Subaru OEM 2.5L Bare Cylinder Head Left Side Subaru STI Type-RA 2018-2021 | 11063AC010 Vehicle Model_Genesis Better engine reliability under sustained

Better engine reliability under sustained load

The larger the AOS

Part #: 56-384

Here's a chance to make the vents on the 2015 WRX / STI to stick out a little more

Subaru OEM 2.5L Bare Cylinder Head Left Side Subaru STI Type-RA 2018-2021 | 11063AC010 Vehicle Model_Genesis Better engine reliability under sustainedFitmen Information: Subaru STI 2018 2021 This is a brand new, blank Genuine OEM EJ257 B25 V25 W25 Cylinder Head straight from Subaru for the left hand side, or USDM driver side. Repairing an engine failure? Building an engine from scratch with your own internals and valvetrain? This is a great option for you, since Subaru no longer offers fully assembled heads as a single part number. These do not contain valves, retainers, springs, cams, seals,