Product Review

Made in the USA.

Features:
Gradual billet taper design precisely guides the piston into the bore without damage
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

See Company23 EJ25 Pinton Ring Compressor video for more details:
https://youtu.be/8CLMAXT2w4M

Works with:
Fits engine bores from 96.52mm-100.33mm (3.80"-3.95")
Perfect for EJ25 engines (fits all stock and oversize pistons/bores)