2015-2021 STI Engine Parts, Upgrades & Modifications

Upgrade and maintain your Subaru STI engine with a wide selection of aftermarket performance engine mods & OEM replacement parts for your STI from Subimods. From the basics like oil, spark plugs, coil pack & engine covers to internal engine components, engine belts, air / oil separators (AOS), motor mounts & more - find quality kits & replacement parts at a great price from top brands like Mishimoto, GrimmSpeed, Cusco, IAG Performance, Perrin, Odyssey & more.

Engine parts compatible with: 2015, 2016, 2017, 2018, 2019, 2020 & 2021 Subaru STI.