Milltek Secondary Catalyst Bypass - Audi RS3 8V Dual Catalyst Systems - SSXAU588

The Milltek Cat Back Secondary Catalyst Bypass removes the secondary catalyst from dual-pipe exhaust assemblies, improving gas flow and reducing restriction. Direct bolt-on fitment uses OEM hangers—no modifications required.

Hand-finished T304L stainless steel construction. Compatible with both OE and Milltek cat-back systems. Not required on turbo-back systems. Designed for vehicles with secondary catalyst architectures common to VAG platforms.

• Fits OE cat-back exhaust systems
• Fits Milltek cat-back exhaust systems
• T304L stainless steel, mandrel-bent construction
• OEM+ fitment, uses factory hangers
• Engineered to eliminate secondary cat restriction

Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Specifications

• Pipe diameter: 76.2mm (3.00")
• Off-road / competition use only. Not legal for use on public roads in the US.

Fitment

• Audi > RS3 > Saloon/Sedan (8V MQB) > 2017 and Later
• Audi > RS3 > Saloon/Sedan (8Y MQB EVO) > 2022 and Later
• Audi > TT MK3 > TTRS 2.5TFSI Quattro > 2016 and Later

• Free US shipping on orders over $250.
• Free pickup at our Dallas shop, usually ready within 24 hours.
• Unused parts can be returned within 30 days. Tunes, opened electronics, merch and installed parts are final sale.
• Want it installed? Book the install at thegbmotors.com.

Full details are on our shipping and returns page.