SLE Audi S4 / S5 B9 (3.0T EA839) 2018–2021 Test Pipe

Description:
The SLE Catless Test Pipe for the 2018–2021 Audi S4 and S5 (B9, 3.0T EA839) is a direct bolt-on upgrade that replaces the restrictive factory catalytic converter. Built from TIG-welded stainless steel, it’s designed to increase exhaust flow, improve turbo spool, and bring out a much more aggressive exhaust note.

With the factory exhaust, expect a deeper tone with sharper crackles during downshifts. If you’re running an aftermarket system, the sound becomes even more pronounced. Perfect for tuned setups looking to reduce backpressure and free up performance.

Product Details:

• 100% catless design

• TIG-welded stainless steel construction

• Improves turbo response and exhaust flow

• Sharper, louder exhaust tone

• Direct bolt-on using factory connection points

• Includes installation hardware

Fitment:

• 2018–2021 Audi S4 B9 (3.0T EA839)

• 2018–2021 Audi S5 B9 (3.0T EA839)

Note:
Intended for off-road use only. May cause a check engine light without proper tuning.