Milltek Sport Audi RS3 Saloon/Sedan 400PS 8V MQB Secondary Catalyst Bypass

Milltek Sport's Secondary Catalyst Bypass pipe for the Audi RS3 Saloon/Sedan 400PS (8V MQB) replaces the secondary catalytic converter section with a straight-through pipe, reducing backpressure at this point in the exhaust system for a genuine flow improvement. This is a targeted upgrade addressing one specific restriction point rather than a complete system replacement, a sensible entry point for owners wanting a meaningful gain without committing to a full downpipe or cat-back upgrade straight away.

Constructed from T-304 stainless steel, this bypass pipe is built to outlast the factory component it replaces, resisting the corrosion that eventually catches up with mild steel factory parts. Reducing restriction at this specific point in the exhaust system contributes to a more responsive, freer-breathing RS3, particularly noticeable when combined with the rest of Milltek's range for this platform.

Why Choose This Secondary Catalyst Bypass

• Targeted upgrade addressing a specific restriction point in the factory exhaust
• T-304 stainless steel construction, genuinely more durable than the factory component
• Contributes to a more responsive, freer-breathing engine
• A sensible entry point before committing to a full system upgrade

Compatibility

• Audi RS3 Saloon/Sedan 400PS (8V MQB)