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AST Suspension 5100 Series Coilovers (Excludes Front/Rear Top Mounts) (True Coilover) - 2008-2016 Audi A4 1.8 TFSI (B8) 330Ci 2013 Subaru WRX STI AWDThe 5100 Series shock absorbers for the 2008 2016 Audi A4 1. 8 TFSI (B8) utilize inverted upside down technology. The inverted design is race proven technology and produces an extremely strong damper, providing better suspension geometry under heavy lateral and braking loads as seen in a road and track environment. The 5100 Series shock absorbers give your car a better performance than the standard twin tube design. With the 5100 Series suspension you