The part is used to bypass the catalyst from the exhaust to create a ‘Decat’ system. Eliminating the catalyst will greatly enhance the gas-flow and the performance, adding significant Hp to your vehicle by removing the density of the catalyst in which exhaust gases are pushed through. – This product is intended for motorsport use only and requires Stage 2 ECU remap.

Every Milltek system is designed, developed and hand-finished here in the UK by time-served craftsmen, each one produced in aerospace grade type 304, non-magnetic stainless steel. This superior material is less susceptible to discolouration, lasts almost indefinitely and is used throughout the entire construction of our pipework, silencers and associated hardware.

Mandrel bending ensures constant radius bends for optimised gasflow, and bore diameters are carefully enlarged over stock to ensure ultimate performance without the loss of mid-range torque. All of the Milltek exhaust systems endure a comprehensive acoustic development process to deliver a tone that is sporty and crisp, without ever inducing NVH, drone or cabin resonance.

In the Box

– High Flow Cat Assembly (Sports Cat Version)
or
– Cat Delete Assembly (De-Cat Version)

Specification

Type of System:Cat Replacement Pipe

Detail:Cat Bypass? fits with OE and Milltek Sport Systems

Pipe (mm):63.5

Pipe (inches):2.5

ValveSonic?:No

Pipework Diameter – 2.50″ (63.50mm)

Compatible models

Audi S4 B9 Turbo 3.0 2016 – 2019