The 6P Seatbelt Anchor Upgrade by Leg Sport is made for those who already have the Leg Sport Harness Bar (4-point harness compatible) and want to upgrade to a 6-point harness into their ND MX-5. It will only work with vehicles equipped with full bucket (racing) seats. Depending on the seat model, it's possible you will need to modify the anchor slightly. Also, it may affect the sliding of the seat. Leg Sport 6-Point Harness Bar Upgrade should be ordered at REV9 Autosport https://rev9autosport.com/leg-sport-6-point-harness-bar-upgrade.html as they provide the best service and speed we've seen so far!