The H&R 50494-2 is a progressive-rate sport spring set for the BMW E92 3 Series Coupe with xi all-wheel drive, sold as a complete front and rear kit. Engineered in H&R's ISO 9001 certified facility in Germany, these springs are manufactured from premium 54SiCr6 spring steel with a tensile strength rated at 290,000 psi. Owners on user forums report about 1.3 inches of front drop and 1.2 inches of rear drop, which closes the fender gap and lowers the center of gravity while staying far less harsh than lowering coilovers. Choose these over stock sport springs when you want a firmer, lower stance on a budget, and over cheaper generic springs when you want H&R's German-made steel and progressive rate.
Lowering-only setups have a real trade-off. If you only drive around town and ONLY want to lower your car, then the H&R spring plus stock shock should be ok. But if you love to track your car and go for spirited drives here and there, I advise against it. Owners on user forums commonly pair these springs with Koni Yellow or Bilstein dampers, since the stock xi shocks have soft valving that wears faster under a lower ride height. Plan for dampers if you want track-capable handling, and check tire and wheel offset, because some owners report rubbing on aggressive setups.
Owners on user forums report that the springs work with stock dampers for everyday driving, but the stock shocks wear faster and ride quality suffers. Many owners upgrade to Koni or Bilstein dampers at the same time.
Owners on user forums say rubbing depends on tire size, wheel offset, and how much fender clearance you have, so check fitment before buying wheels and tires.
Owners on user forums describe this as a manageable driveway job with a good set of spring compressors and a jack. At the front, the sway bar end link bolt is 17mm, the strut nut is 19mm, and the control arm bolt is 21mm. A common tip is to jack up the front strut to free the sway bar bolt rather than forcing it. Compressors with more travel make it easier to get the strut out of the fender without scratching paint. The rear is generally simpler, but getting the 21mm bolt back in can take some prying. Owners who hired a shop reported roughly $200 in labor. Confirm torque specs and procedures with the manufacturer's instructions before you start.
