EJ20 Piston Ring Compressor by Company23 (515) - Modern Automotive Performance - 2
EJ20 Piston Ring Compressor by Company23 (515) - Modern Automotive Performance - 1
EJ20 Piston Ring Compressor by Company23 (515) - Modern Automotive Performance - 3

Company23 EJ20 Piston Ring Compressor | Multiple Subaru Fitments (515)

Company23
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Features: Gradual billet taper design precisely guides the piston into the bore. Will not damage piston or rings. Adjustable diameter allows one tool to work on all stock and oversize pistons/bores of a particular engine. Convenient tool-less thumb adjuster makes adjustments easy. CNC machined from tempered and anodized aerospace grade alloy.Works with: Fits engine bores from 90.17mm-93.98mm (3.55"-3.70") Perfect for EJ20 engines (fits all stock and oversize pistons/bores) Comparable to factory tool #398744300

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Customer Reviews

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L
L D LAUTENSCHLAGER
Great for pistons near the max OD of the range

I was glad to find this since I have some expensive solid diameter tapered ring compressors at 2 sizes near the smallest diameter in the range of this expandable tool. Now I need one 0.030 inch larger and didn’t want to order yet another expensive one. This should work, but at the lower end of the range it is too far out of round to be effective without over clamping on the piston to get the rings to compress fully at the gap in the tool diameter. It would work great at the upper end of the range though.
I’m going to send it back and get one that works for my application.