CTS TURBO Downpipe for B9 Audi S4/S5

The CTS Turbo cat-delete test pipe for B9 S4 / S5 3.0T EA839 was developed with one goal in mind – maximum flow and maximum power. Don't compromise with restrictive factory components – unleash the full potential of your 3.0T.

Engineered with the latest CAD technologies, this component is designed to directly replace the factory catalytic converter, ensuring a perfect fit. It is made from T304 stainless steel, hand TIG welded and internally back-purged for long-lasting and reliable performance.

In addition to a noticeable improvement in power and performance, the CTS test pipe also transforms the car's sound. With a factory exhaust system, you will get a deeper, sportier tone and a more pronounced "pop" on downshifts. On acceleration, you will enjoy a distinct "braap" when shifting through all 8 gears. With an aftermarket exhaust, the sound becomes even more intense.

Product details:

• Designed and tested in real conditions

• Constructed from T304 stainless steel, TIG welded and back-purged

• Replaces the restrictive factory catalytic converter

• Mounting hardware included

• Serious power upgrade without compromise

• Sporty sound – discreet when driving calmly

• No drone with factory exhaust system

• Polished finish for a premium look

⚠️ Important:

• Appropriate software is required to avoid a Check Engine Light and ensure proper operation.

• Intended for racing / off-road use.

• Not legal for use on public roads.