4.035 CR Piston Ring Set 1.5 1.5 3.0mm File Fit

The 4.035 CR Piston Ring Set 1.5 1.5 3.0mm File Fit by TOTAL SEAL is engineered for engine builders and serious mechanics who demand precision bore control and extended ring life in high-performance and competition applications. This file-fit ring set is designed for engines where stock tolerances have been altered through boring or stroking operations, requiring custom ring fitment to ensure proper sealing and minimal blowby. Whether you're building a street performance engine, preparing for track duty, or restoring a classic with modern upgrades, precision ring selection is foundational to reliable compression and oil control.

Each ring in this 4.035 bore diameter set features the classic 1.5mm top ring, 1.5mm second ring, and 3.0mm oil ring configuration, the proven standard across thousands of rebuilt engines. File fit means these rings require final fitting to your specific piston and cylinder bore—typically a light honing or manual file pass to achieve ideal clearances and ensure consistent tension across the entire ring circumference. TOTAL SEAL's manufacturing expertise ensures dimensional consistency, superior ring material that resists scuffing and wear, and coatings optimized for break-in and long-term durability. This level of precision fitment eliminates the guesswork of off-the-shelf rings and guarantees the compression and oil control performance your engine build deserves.

File-fit ring sets are ideal for engine builders who have already invested in custom pistons, bore work, or specialty machine shop services and want ring fitment matched to those specifications. Installation requires careful measurement of piston groove widths and bore diameter to confirm fit before final engine assembly—many shops perform a final honing pass or use a file to achieve the manufacturer's recommended side clearance. Compatibility depends on your specific piston brand and groove dimensions, so consultation with your machine shop or engine builder is recommended to verify this set matches your build specifications. For serious engine work, TOTAL SEAL file-fit rings deliver the precision control that separates a reliable powerplant from one prone to blowby and premature wear.