Coupler 3/4in DD x 1in DD Steel

The Coupler 3/4in DD x 1in DD Steel from BORGESON is a precision steering shaft coupler designed to connect mismatched steering column shafts in custom vehicle builds and restoration projects. This product is particularly useful for mechanics working on modern swaps, older chassis updates, and aftermarket steering configurations.

Featuring a 3/4-inch double-D bore on one end and a 1-inch double-D bore on the other, this coupler effectively bridges two standard steering shafts with different diameters. Its steel construction ensures rigidity and durability, which are critical for maintaining steering feedback and safety. The double-D spline design provides a positive mechanical engagement, preventing flex or play that could compromise steering response.

This coupler is ideal for engine swaps, steering column transplants, and restorations where original and aftermarket components must interface without modification. Its design eliminates misalignment issues that can occur with slip-fit or single-keyway designs, making it a reliable choice for various steering system applications.