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aFe Twisted Steel 3" downpipe with integrated high‑flow catalytic converter for 2009–2016 Audi A4/A5 (B8) 2.0T. Constructed from 304 mandrel-bent stainless steel with laser-cut flanges and 100% TIG welds, it includes a third O2 bung for wideband or auxiliary instrumentation and uses factory hangers and flanges for no-modification install. Dyno-tested gains up to +14 HP and +6 lb‑ft.
aFe 09-16 Audi A4/A5 (B8) L4-2.0L (t) Twisted Steel 3in. Downpipe - 304 Stainless w/ Cat
