OE Replacements: 121331, CUP121331, 3957131, 3957131, 4333-1842114C1, 1842114, 1842114C1

Details: O-Ring 0.07 in C/S x 0.364 in ID 1.78 mm C/S x 9.25 mm ID Buna N 75, Peroxide Cured Series # -012

Multiple Engine Applications

Direct replacement for OE part 3957131

Durable Buna N construction

Quality You Can Trust – PAI has established themselves as the leading supplier of aftermarket heavy duty diesel parts, with quality standards that always meet or exceed OE standards

DETAIL – HDKits O-rings are carefully designed and feature unparalleled low tolerances. O-ring specifications are measured in a 3D environment and tested to ensure the 100% functionality.