034Motorsport Density Line Lower Control Arm Kit, B8/B8.5 Audi A4/S4, A5/S5/RS5 & Q5/SQ5 MSRP: $800.80
JXB Performance Audi B9 S4/S5/RS4/RS5 Driveshaft Center Support Bearing Carrier Upgrade MSRP: $413.99 - $453.99
034Motorsport Dynamic+ TCU Software Upgrade for AL552 ZF8 Transmission, B9 RS4/RS5 MSRP: $136.00 - $1,020.00