Speedway Motors Piston Ring Squaring Tool 4.000–4.230 Inch Cylinder Bores, Dual-Sided 6061-T6 Aluminum for Accurate Ring End Gap Measurements, Fits Blocks with Head Studs Installed

Speedway Motors Piston Ring Squaring Tool 4.000–4.230 Inch Cylinder Bores, Dual-Sided 6061-T6 Aluminum for Accurate Ring End Gap Measurements, Fits Blocks with Head Studs Installed

• Accurate Ring Positioning – Provides the most reliable way to square piston rings in the cylinder bore for precise end-gap measurement, improving overall engine setup consistency.
• Dual-Diameter Design – Features two machined sizing steps, allowing one tool to service 4.000" through 4.230" bore diameters simply by flipping it over.
• Durable 6061-T6 Aluminum – Made from high-strength anodized aluminum for long service life, smooth operation, and resistance to shop wear.
• Works with Head Studs Installed – Outer diameter is engineered to clear installed cylinder head studs, eliminating the need to remove hardware during measurement.
• Open-Center Configuration – Hollow center lets you visually confirm the ring is fully seated and square in the bore, making it more accurate and easier to use than relying on a piston.