The H&R 06-15 Mazda Miata MX-5 Sport Spring is a lowering spring set designed for the NC-generation MX-5 Miata, sold under part number 52620. It is intended to replace the factory springs on a car that already handles well but sits higher and softer than many enthusiasts want for autocross, track days, or spirited back-road driving. Buyers searching for an NC Miata sport spring, a 2006-2015 MX-5 lowering spring, or an H&R Miata handling upgrade are looking for this type of part.
Compared with stock springs, a sport spring is a focused way to change the car's stance and body control without moving to a full coilover kit. Buyers choosing this part over a cheaper generic spring should confirm the exact drop and spring rates with the manufacturer, since those figures determine how the car will ride and corner. Fitment should be confirmed against the model year and suspension type before ordering. Installation is typically a DIY-level job for an experienced home mechanic, but it should be done with the car properly supported, and the wheel alignment should be checked afterward.