Company23 EJ25 Piston Ring Compressor

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The Company23 EJ25 Piston Ring Compressor is a precision tool designed to simplify and protect piston installation for Subaru EJ25 engines. This essential compressor ensures smooth , damage-free piston assembly by compressing rings accurately, making it a must-have for Subaru WRX, WRX STI, and other EJ25 platform builds. Whether you’re rebuilding or upgrading your engine, this tool helps you achieve professional results with ease. Crafted from aerospace-grade alloy and CNC-machined for durability, the compressor features a gradual billet taper design that guides pistons safely into the bore. Its adjustable diameter fits stock and oversize pistons ranging from 96.52mm to 100.33mm (3.80"–3.95"), and the tool-less thumb adjuster allows quick, hassle-free size changes. This robust design ensures long-lasting performance and precise alignment during installation. Ideal for Subaru enthusiasts and engine builders focused on performance and reliability, the Company23 EJ25 Piston Ring Compressor from Subimods streamlines your engine rebuild process. Upgrade your toolkit with this premium, Subaru-specific compressor and experience smoother, safer piston installations every time. Show more