IAG Performance Short Block Plug & Rear Main Seal Kit 2015-2021 WRX YMM_2021_STI The firmer bushings ensure more

The firmer bushings ensure more consistent alignment angles through corners by minimizing bush compliance

Ideal for Subaru enthusiasts seeking a top-tier upgrade

Check the K&N catalog or website for vehicle applications and specific CARB status for each vehicle and air intake

The IAG AOS is available in your choice of black

IAG Performance Short Block Plug & Rear Main Seal Kit 2015-2021 WRX YMM_2021_STI The firmer bushings ensure moreUpgrade your Subaru WRX engine rebuild with the IAG Performance Short Block Plug & Rear Main Seal Kit, designed specifically for 2015 2021 WRX models. This essential kit ensures a proper seal on the rear of your short block, preventing oil leaks and enhancing engine reliability. Perfect for enthusiasts refreshing or assembling a new engine, it provides peace of mind with quality components. The kit includes one genuine rear main seal and three OEM oil