Black Mamba Downpipe for Audi RS4 B9/ RS5 B9

Black Mamba 4.5” (114.3 mm) → 3” (76 mm) Decat Downpipes are developed for maximum flow and serious gains on 2.9 TFSI engines.

This 2-piece kit replaces the factory catalytic converters, freeing the twin-turbo V6 configuration from restrictive back pressure.

Performance Without Compromise

• Up to +34 hp on Stage 1

• Significantly reduced back pressure

• Faster spool and more aggressive response

• Deep, clear, and sporty exhaust note

Technical Specifications

• Direct bolt-on installation

• 2-piece design for optimal fitment

• Made from premium T304 stainless steel

• Diameter: 4.5” (114.3 mm) → 3” (76 mm)

• Hand TIG-welded joints for maximum strength

• Optional thermal insulation (reduces heat radiation by up to 50%)

• Mounting kit included

• Lifetime warranty

Important

⚠ ECU recalibration required
⚠ Not compatible with OPF/GPF equipped models
⚠ Intended for off-road / motorsport use