Company23 EJ20 Piston Ring Compressor

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The Company23 EJ20 Piston Ring Compressor is an essential tool for Subaru enthusiasts and mechanics working on EJ20 engines. It streamlines piston installation by ensuring a smooth , damage-free fit, protecting both pistons and rings during assembly. This compressor is designed to simplify rebuilds and improve precision, making it a must-have for any Subaru WRX, WRX STI, or EJ20-powered vehicle project. Crafted from aerospace-grade alloy, this tool features a CNC-machined, tempered, and anodized finish for exceptional durability and accuracy. Its adjustable diameter fits engine bores from 90.17mm to 93.98mm (3.55"-3.70"), accommodating both stock and oversize pistons. The gradual billet taper guides pistons precisely into the bore, while the tool-less thumb adjuster allows for quick, hassle-free sizing without needing multiple compressors. Comparable to factory tool #398744300, it delivers professional-grade performance for your engine rebuilds. Ideal for Subaru enthusiasts seeking reliable, high-quality tools, the Company23 EJ20 Piston Ring Compressor enhances your rebuild toolkit. Upgrade your engine assembly process with this premium compressor from Subimods and experience smoother, safer piston installations every time. Show more