Supertech Subaru 100mm Bore Piston Rings - 1.2x3.45mm / 1.2x4mm / 2.0x2.7mm - Set of 4

If you're rebuilding the engine in your Subaru and need to ensure a solid seal between the piston and cylinder wall, these Supertech piston rings are what you're looking for. This set is designed for a 100mm bore, which is common in many Subaru performance and some stock applications. Proper ring seal is critical for compression, oil control, and overall engine health, especially when you're putting in new pistons or honing the cylinders.

This particular set features a specific ring configuration: the top ring is 1.2mm thick with a 3.45mm back clearance, the second ring is 1.2mm thick with a 4mm back clearance, and the oil ring is a 2.0mm x 2.7mm two-piece design. This combination is often chosen for its ability to handle increased cylinder pressures and temperatures found in modified or performance-oriented engines. Supertech is known for making well-built internal engine components, and these rings are made to meet the demands of a performance rebuild.

When you're installing these, pay close attention to the ring gap specifications for your specific engine build. Ensuring the correct gap is crucial for performance and longevity. This set includes all the rings needed for a complete set of four pistons.