Milltek Large Bore Dowpipe with Hi-Flow Sports Catalyst (For All Exhausts) – 63.5mm (2.5″)

Audi S5 Coupe (B9; 2017-) 3.0 TFSI V6 Quattro - Sport Diff Models



OEM Catalysts are commonly very dense and restrictive on gas-flow. The Milltek Hi-Flow Sports Catalyst reduces the restriction over the OE catalysts, allowing for a free-flowing exhaust system to improve your engine’s performance. This Hi-Flow Sports Cat comes equipped with a downpipe, designed to improve the gas-flow and maximise the effect of the sports cat. – Requires Stage 2 ECU Remap.

200 Cell HJS High Flow Sport Cat

SKU: SSXAU673*****

£1,541.22 exc VAT
£1,849.46 inc VAT
SKU: SSXAU673***** Categories: , , , , Brand:

OEM Catalysts are commonly very dense and restrictive on gas-flow. The Milltek Hi-Flow Sports Catalyst reduces the restriction over the OE catalysts, allowing for a free-flowing exhaust system to improve your engine’s performance. This Hi-Flow Sports Cat comes equipped with a downpipe, designed to improve the gas-flow and maximise the effect of the sports cat. – Requires Stage 2 ECU Remap.

All our performance exhaust systems are designed with you in mind, and we cater to an ever-expanding range of vehicles. We believe in continuous evolution, and our research & development team work throughout the year to deliver the most in demand solutions to all your performance exhaust requirements. All of our products are made in the UK and distributed to more than 90 countries worldwide, making Milltek Sport one of the most accessible performance aftermarket brands on the market.



  • MSAU704


SKU SSXAU673
Milltek Product type Downpipes, Sport Cats & Manifolds
Resonated Not Applicable
Tip Finish Not Applicable
Tip Shape Not Applicable
Pipe Diameter 63.5mm (2.5")
EC Approved No
Off Road Use Only No