4.290 CR Piston Ring Set File Fit 1/16 1/16 3/16

The 4.290 CR Piston Ring Set File Fit 1/16 1/16 3/16 by TOTAL SEAL is designed for precision engine builders and mechanics engaged in top-end rebuilds or performance modifications. This piston ring set is essential for achieving proper ring gap sizing and controlling blowby in 4.290-inch bore engines, making it suitable for both classic small-block restorations and modern stroker builds.

Featuring a proven configuration of a 1/16-inch top ring, 1/16-inch second ring, and 3/16-inch oil ring, this set maximizes seal integrity while minimizing friction losses. The file-fit construction allows for precise tailoring of ring gaps to match specific bore finishes and combustion chamber volumes, ensuring optimal performance and preventing gap closure at temperature extremes.

This ring set is particularly beneficial for builders working with small-block Chevy, Ford, and Mopar platforms that are commonly bored to 4.290 inches, as well as for custom engine programs where standard OEM ring sets may not suffice. Proper installation requires a ring file, precise gap measurement, and careful piston groove preparation to ensure the best results.