Steering Couplers and Steering U-Joints
Shop smooth operating, durable U-joints and couplers. Find your match.
Steering Couplers and Steering U-Joints
Steering U-Joints & Splined Couplers for Race Car Steering Systems
Pro-Werks roller bearing steering U-joints and weld-on splined couplers are precision machined in the USA from alloy steel and 4130N chromoly. Every splined component is broached to the correct profile and 100% test-fit inspected — guaranteed to fit their intended purpose.
Roller Bearing Steering U-Joints — Zero Backlash, 32° Max Angle
Precision machined alloy steel bodies fitted with caged needle bearings and a slight pre-load for zero backlash. Enhanced sensitivity at the steering wheel — even the smallest steering input is more effective. Pre-greased and sealed with hi-temp O-rings for longevity in severe conditions. Capable of 32° operating angle — recommended not to exceed 20° for smoothest result. Made in USA
Note: The Stiletto 5/8-36 spline has a unique pressure angle proprietary to Stiletto Steering. It will not fit OEM 5/8-36 splined components or aftermarket attempts to replicate it. Trust genuine Pro-Werks — splined ends are broached to the correct original manufacturer specifications. Made in USA
- 5/8-36 Spline × 3/4" Bored — Fits 6.4:1, 10:1, 12:1, 15:1 Stiletto Rack-N-Pinion — 1/4-28 NF Set Screws —Pro-Werks 5/8-36 Spline × 3/4" Bored Roller Bearing Steering U-Joint
- 9/16-26 Spline × 3/4" Bored — Fits Stiletto 20:1 Pro-Box, Gen5 Small Box (C42-348 series), Pinto OEM Rack — 1/4-28 NF Set Screws — Pro-Werks 9/16-26 Spline × 3/4" Bored Roller Bearing Steering U-Joint
- Smooth Bore Both Ends — 5/8" or 3/4" ID — For Custom Shaft Configurations — Pro-Werks Smooth Bore Roller Bearing Steering U-Joint
Weld-On Splined Couplers — For Stiletto Rack & Pinion
When a U-joint is not desired or build constraints require a direct connection, Pro-Werks weld-on splined couplers provide a proper, secure connection between your steering shaft and Stiletto rack & pinion. Available in Split-Bolt, Dual-Lock, and Straight styles. Made in USA
- Split-Bolt — positive clamping on splines plus bolt through the retaining groove of the pinion for added security
- Dual-Lock — two set screws with locking nuts offset 90° from each other, eliminating lost motion; screws locate in the external retaining groove to prevent spline deformation
- Straight — no built-in retention; installer incorporates their own locking method for the specific application
- 5/8-36 Female Spline — Fits 6.4:1, 10:1, 12:1, 15:1 Stiletto Rack — Straight, Dual-Lock & Split-Bolt Styles, 4130N or Mild Steel, 5/8" or 3/4" Bore — 5/8-36 Female Spline Weld-On Splined Coupler
- 9/16-26 Female Spline — Fits Stiletto 20:1 Pro-Box, Gen5 Small Box, Pinto OEM Rack — Dual-Lock or Split-Bolt, 4130N or Mild Steel, 3/4" Bore — 9/16-26 Female Spline Weld-On Splined Coupler
Complete Your Steering System
- Stiletto Steering Systems — full lineup of Stiletto rack & pinion units these couplers are designed for
- Steering Components — butterfly wheels, quick release hubs, steering bearings, shafts & spindles
- Rod Ends — FK Bearing and Aurora heim joints for steering linkage connections
Proudly Made in the USA.









