New Piston Ring Squaring Tools from ARP

ARP Piston Ring Squaring Tools

The important process of gapping piston rings is made easier and more accurate thanks to
ARP’s precision Piston Ring Squaring Tools. Setting a ring absolutely perpendicular to the bore is assured through use of the ARP Squaring Tool, which registers on the block deck. This is far more accurate than using a piston or other device that can rock in the bore and place the ring at an angle. Precise end gaps are essential to achieve optimum combustion sealing.

ARP’s Piston Ring Squaring Tools are precision CNC machined from 6061-T6 billet
aluminum and black anodized for long-lasting protection. They come in six sizes, with ranges
covering bores from 3.150″ (80mm) to 4.800″ (122mm). The sizes are prominently engraved on
the tools for ease of selection.

In addition to in-block gapping, the squaring tools can be used in conjunction with ARP’s
bore-specific Tapered Ring Compressors to facilitate gapping the rings on a bench for added
comfort and convenience. ARP offers Tapered Ring Compressors in over 125 different sizes to
accommodate virtually every popular SAE and Metric bore.

More information can be obtained by visiting ARP’s website ( and
downloading the data, or by requesting a free printed copy of the catalog. Write to ARP, 1863
Eastman Ave., Ventura, CA 93003 or call 800-826-3045.

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