The H&R 50464 is a sport spring set for the E39 BMW 540i, the 4.4-liter V8 sedan that came with the factory Sport suspension. Owners on user forums call these the correct springs for a 540i Sport, and they say the set sits lower and stiffer than the OEM sport springs, which tightens the stance without converting to a full coilover setup.
Owners on user forums report about 0.75 in the front and .60 in the rear of drop, a modest change aimed at the tall factory stance. One forum owner ran a set for roughly 10,000 miles and reported everything still in good working order before switching to Bilstein PSS9 shocks, which is useful longevity evidence when weighing the price against cheaper lowering options. Buyers searching for E39 540i Sport lowering springs, H&R 50464 sport springs, or M62 4.4L sport spring replacement will find this set matches the factory sport suspension configuration.
Owners on user forums report roughly 0.75 inch of front drop and 0.6 inch at the rear. Exact figures weren't confirmed on a manufacturer source, so check with the manufacturer for official numbers.
Owners on user forums describe them as the correct springs for a 540i Sport, and they report the set runs lower and stiffer than the factory sport springs.
Published year ranges differ, with some sources listing 1996 and others 1997 as the start year, both ending in 2003. Confirm your exact car's year and body style with the manufacturer before ordering.