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  6. Secondary Catalyst Bypass - Fits both OE and Milltek Sport Cat Back Systems? Not required on Turbo Back System *** Not all vehicles come equipped with secondary cats? visual check recommended before ordering *** - RS3 - Saloon / Sedan 400PS (8V MQB)
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Milltek SSXAU588
  • Milltek SSXAU588

Secondary Catalyst Bypass - Fits both OE and Milltek Sport Cat Back Systems? Not required on Turbo Back System *** Not all vehicles come equipped with secondary cats? visual check recommended before ordering *** - RS3 - Saloon / Sedan 400PS (8V MQB)

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Milltek SSXAU588
Milltek
Secondary Catalyst Bypass - Fits both OE and Milltek Sport Cat Back Systems? Not required on Turbo Back System *** Not all vehicles come equipped with secondary cats? visual check recommended before ordering *** - RS3 - Saloon / Sedan 400PS (8V MQB)
MSRP: £242.89
Was:
Now: £218.60
(You save £24.29 )
Brand
Milltek
SKU:
SSXAU588
UPC:
Condition:
New
Type of System:
Secondary Catalyst Bypass
Detail:
Fits both OE and Milltek Sport Systems? Not required on Turbo Back System *** Not all vehicles come equipped with secondary cats? visual check recommended before ordering ***
Pipe (mm):
76.2
Pipe (inches):
3
ValveSonic?:
No
Shipping Info:
Ships in 1 box measuring 100X 40 X 30 and weighing 7kg.
EC Approved:
No

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  • Description
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.

The use of de-cats, sports cats are for off road/motorsport use only. Using these parts would inhibit your vehicle from passing a MOT test.

Only EC type-approved components are legal and fit for road use.
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Milltek SSXAU588

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Secondary Catalyst Bypass - Fits both OE and Milltek Sport Cat Back Systems? Not required on Turbo Back System *** Not all vehicles come equipped with secondary cats? visual check recommended before ordering *** - RS3 - Sportback 400PS (8V MQB - Face

MSRP: £242.89
Was:
Now: £218.60
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Milltek SSXAU588

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Secondary Catalyst Bypass - Fits both OE and Milltek Sport Cat Back Systems? Not required on Turbo Back System - RS3 - Sportback (8V MQB - Pre Facelift Only) - 2015-2017 - SSXAU588_1

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Milltek SSXAU588

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Secondary Catalyst Bypass - Fits both OE and Milltek Sport Cat Back Systems? Not required on Turbo Back System - TT Mk3 - TTRS 2.5TFSI Quattro - 2016-2020 - SSXAU588_3

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Large-bore Downpipe and De-cat - Fits both OE and Milltek Sport Cat Back Systems - RS3 - Saloon / Sedan 400PS (8V MQB) - 2017-2020 - SSXAU727

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Large-bore Downpipe and De-cat - Fits both OE and Milltek Sport Cat Back Systems - RS3 - Saloon / Sedan 400PS (8V MQB) - 2017-2020 - SSXAU727

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Large Bore Downpipe and Hi-Flow Sports Cat - Fits both OE and Milltek Sport Cat Back Systems - Requires Stage 2 ECU Software - RS3 - Saloon/Sedan 400PS (8Y MQB EVO) - OPF - 2021 - SSXAU818

Milltek

Large Bore Downpipe and Hi-Flow Sports Cat - Fits both OE and Milltek Sport Cat Back Systems - Requires Stage 2 ECU Software - RS3 - Saloon/Sedan 400PS (8Y MQB EVO) - OPF - 2021 - SSXAU818

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© 2025 Milltekshop.com Awesome GTI Ltd t/a Milltekshop.com is a credit broker, not a lender and is authorised and regulated by the Financial Conduct Authority (FRN 650745). We do not charge you for credit broking services. Finance is introduced through the Deko platform from a carefully selected panel of lenders. Deko is a trading name of Pay4Later Ltd, which is authorised and regulated by the Financial Conduct Authority (FRN 728646). Deko is a credit broker, not a lender and does not charge you for credit broking services. Whichever lender Deko introduces you to, Deko will typically receive a commission from them (either a fixed fee or a percentage of the amount you borrow). For your reassurance, all of the lenders Deko works with could pay commission at different rates, but the commission received does not influence the interest rate you will pay. You will be offered the best rate available from Deko’s partner lenders, based on the lenders’ decision policies.
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