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Smooth & predictable control
for lower exhaust gas backpressure
Please note that the stock hardware (M8 bolt & nut
which are the OE plugs that come on the 8V A3/S3
To view a demonstration of GIAC's Flashloader switching device
CTS Turbo 2018+ B9 Audi S4/S5 V6T 3.0T (EA839) Downpipe Add High Flow Cat::Yes Smooth & predictable controlCTS Turbo B9 S4 S5 3. 0T (EA839) downpipe is made to maximize exhaust flow for highest power gains. Do not compromise performance and sound with factory parts unleash your B9 S4 S5 3. 0T potential! Designed using the latest in CAD technology; this part is made to fit perfectly in place of restrictive factory catalytic converter. Manufactured from T304 stainless steel, hand TIG welded and back purged to ensure years of reliable performance. In addition
