AWE Tuning Resonated Downpipes for Audi B8 RS5 Fitment: Audi B8.5 RS5 4.2L Resonated Downpipes The Track Edition + our Resonated Downpipes = our Touring Edition Exhaust. AWE Tuning Resonated Downpipes are constructed from 2.5” T304 Stainless Steel and include a resonator to produce a... MSRP: Was: Now: £2,083.97 Add to Cart