Milltek Hi-Flow Sports Cat | Audi RS3 8V

Description

ECE-approved hi-flow sports cat designed for European road use (R103 compliant). T304L stainless steel construction with 200–300 cell density provides unrestricted exhaust flow without requiring ECU recalibration or triggering diagnostic codes. Direct fitment with OEM cat-back systems and Milltek cat-back exhausts. Hand-finished T304L stainless steel core with CNC-formed housings. EC Type Approval ensures full street legality across Europe. No software modifications required—bolt-on installation using existing hangers and O2 sensor locations. Fitment: • Compatible with OEM factory cat-back systems • Compatible with Milltek cat-back exhaust systems • Retains OE oxygen sensor and diagnostics • No ECU tune or check engine light risk Engineered for sustained flow and reliability on both road and circuit. Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Fits 16 vehicles including:

• 2017 Audi RS 3— Saloon/Sedan (8V MQB) > 2017 and Later
• 2018 Audi RS 3— Saloon/Sedan (8V MQB) > 2017 and Later
• 2019 Audi RS 3— Saloon/Sedan (8V MQB) > 2017 and Later
• 2020 Audi RS 3— Saloon/Sedan (8V MQB) > 2017 and Later
• 2021 Audi RS3— Saloon/Sedan (8V MQB) > 2017 and Later
• 2022 Audi RS 3— Saloon/Sedan (8V MQB) > 2017 and Later
• + 10 more vehicles