Description
SPL Parts 99-05 Mazda Miata (NB) Tie Rod Ends (Bumpsteer Adjustable/Power Steering Rack Only) is a chassis-specific suspension upgrade engineered for drivers who want more precise geometry control from 99-05 Mazda Miata (NB). SPL Parts focuses on competition-grade suspension and alignment hardware, combining in-house development with U.S.-sourced materials and precision manufacturing for demanding street and track applications.
This adjustable tie-rod solution is intended to correct steering-link geometry by relocating the outer pivot after ride-height or suspension-geometry changes. Properly setting tie-rod height helps reduce unwanted toe change through bump and rebound, improving steering linearity and stability as the suspension moves. For a lowered or track-prepared chassis, that extra bump-steer control can make turn-in more predictable, reduce mid-corner steering corrections, and help the front tires maintain a more consistent slip angle over uneven pavement and curbing.
Why it matters: On this application, the goal is to keep the tire and upright closer to the intended alignment as loads rise, giving the driver a more repeatable platform for braking, turn-in, mid-corner balance, and power application. Final toe and bump-steer settings should be established during a professional alignment with the vehicle at its intended ride height.
After installation, recheck fastener torque and alignment after the initial heat cycles or track use so the setup remains repeatable.