The H&R 50317 is a four-spring sport lowering set for the C6-generation Audi S6 sedan, which uses the 5.2L V10 and quattro all-wheel drive, and it covers 2007 through 2011 models. Its progressive-rate coils are designed to close the factory fender-well gap and lower the center of gravity, which tightens cornering body control while keeping everyday ride comfort. The springs are made from 54SiCr6 spring steel, so this is a more affordable first suspension upgrade than coilovers for a 2007-2011 S6 AWD V10 non-wagon.
Owners on user forums say the ride stays close to factory, but the drop is fixed, so you cannot control rake without adding rear spacers. They also warn that softer factory-style dampers can feel mismatched against firm springs, so budget for matching shocks if you want the setup to feel right. Searches like C6 S6 V10 sport springs, S6 non-wagon lowering springs, and S6 fender gap fix point to this exact kit.
No. This kit is listed for non-wagon sedans only, so Avant (wagon) models need a different application.
Owners on user forums report that the springs work with factory or aftermarket shocks, but softer dampers can feel mismatched with the firmer spring rate. Many owners pair the springs with stiffer dampers for a more consistent ride.
No. Owners on user forums note that the drop is fixed, so rake can only be changed with spacers, which are commonly used at the rear.
Owners on user forums recommend a performance alignment after the springs go in, and budget for it as part of the job.
Expect the front and rear to be very different jobs. Owners on user forums say the front can be swapped without a spring compressor when you are replacing factory sport springs, and one owner rated the overall job 9 out of 10 in difficulty. The rear is the harder side: owners describe it as the most difficult spring change they have done on a car, and they recommend a spring compressor, an impact gun, and possibly a special tool for the strut top bolt. A common rear procedure involves lowering the subframe and removing the lower shock bolt before the spring can be pried out. Plan for a professional alignment afterward, and do not skip it, since owners on user forums link lowering-related handling and wear problems to skipped or poorly done alignments.
