H&R's Race Spring kit (part 29839) is a four-spring lowering set for the first-generation Mazda Miata NA chassis. Their springs will drop those year NA8s 1.5". Owners on user forums also point out that they start with a '96/'97 Miata, which rode the highest, so the real drop depends on each car's starting height. Against a stock setup, the gain is a lower stance and a more planted feel on autocross courses, track days, and back roads.
Choose this kit over a cheap generic drop spring if you want a predictable, moderate drop from a known German spring maker. The body roll was reduced but not dramatically. Owners also call the springs too soft for the lowering they give, so budget for a quality performance damper rather than expecting the springs to do the work alone. Owners on user forums also note that H&R don't give the spring rates on their website, so buyers chasing a specific rate should look elsewhere.
Per the manufacturer's technical FAQ, springs marked VA, (F), or Front go on the front, and springs marked HA, (R), or Rear go on the rear.
No. The manufacturer states that color does not indicate which springs you have; the part numbers printed on the springs or box identify the kit.
The manufacturer recommends checking alignment after any suspension ride height modification, and following the factory service manual guidelines to get as close to factory specification as possible.
Owners on user forums say a spring compressor is needed to remove the factory springs safely. The problem was the Koni's were also on the lowest spring perch. Forum owners who kept worn shocks at the lowest perch setting had to add spacers to stop constant bottoming, so check your shocks before you install. Measure ride height from the center of the wheel to the lip of the fender before and after the swap, as the manufacturer advises, and book an alignment when you finish.
