Milltek Sport Audi RS3 Sportback 8V (Pre-Facelift) Primary Hi-Flow Sports Cat and Turbo Elbow

Milltek Sport's Primary Hi-Flow Sports Cat and Turbo Elbow for the Audi RS3 Sportback (8V MQB, Pre-Facelift Only) replaces the factory primary catalytic converter with a genuinely higher-flow metal substrate cat, positioned directly at the turbo outlet for improved response while retaining meaningful emissions control. This sits at exactly the point in the exhaust system where reduced restriction has the most immediate effect on throttle response, right where boost pressure first meets the exhaust system after leaving the turbo.

Constructed from T-304 stainless steel, this sports cat and elbow assembly is built to outlast the factory component it replaces, resisting the corrosion that eventually catches up with mild steel factory parts. Unlike a full de-cat pipe, this configuration retains genuine catalytic converter function, a sensible choice for owners wanting improved flow while staying closer to emissions compliance than a straight-through pipe.

Important fitment note: this is specifically for pre-facelift models. Confirm your exact build date before ordering, as this part is not compatible with facelifted RS3 Sportback models.

Why Choose This Primary Hi-Flow Sports Cat and Turbo Elbow

• Higher cell-count metal substrate, genuinely improved flow over the factory cat
• Retains meaningful catalytic converter function, unlike a full de-cat pipe
• Positioned directly at the turbo outlet, where restriction matters most
• T-304 stainless steel construction, built for long-term durability

Compatibility

• Audi RS3 Sportback (8V MQB), Pre-Facelift Only