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Milltek catless cat replacement pipes for the Audi S5 Sportback B9 }
Milltek catted 200-cell hjs race cat downpipe for the Audi S5 Sportback B9 }
Another view of the Milltek catted 200-cell hjs race cat downpipe for the Audi S5 Sportback B9 }
Another view of the Milltek catted 200-cell hjs race cat downpipe for the Audi S5 Sportback B9, alternate photo 2 }
Another view of the Milltek catted 200-cell hjs race cat downpipe for the Audi S5 Sportback B9, alternate photo 3 }
Milltek catless cat replacement pipes for the Audi S5 Sportback B9
Milltek catted 200-cell hjs race cat downpipe for the Audi S5 Sportback B9
Another view of the Milltek catted 200-cell hjs race cat downpipe for the Audi S5 Sportback B9
Another view of the Milltek catted 200-cell hjs race cat downpipe for the Audi S5 Sportback B9, alternate photo 2
Another view of the Milltek catted 200-cell hjs race cat downpipe for the Audi S5 Sportback B9, alternate photo 3

Milltek Sport Downpipes - 2018-2024 Audi S5 3.0T B9 Sportback

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Brand: Milltek SportSKU / Part #: SSXAU674
$752.25
$885.00
$752.25
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Subtotal: $752.25
Milltek Sport Downpipes - 2018-2024 Audi S5 3.0T B9 Sportback
Subtotal: $752.25
Not sure it fits? Text us your VINSee all fitment

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Overview

These Milltek Sport parts fit the 2018-2024 Audi S5 Sportback (B9 and B9.5) with the 3.0 liter turbo V6. Choose a Milltek downpipe with a 200-cell HJS race catalyst for the S5 Sportback, or catless cat replacement pipes for track use; both let the turbo V6 spool faster and sound sharper. A Milltek hot-side part replaces the restrictive factory section with larger, smoother T304L tubing, so exhaust gas leaves the engine with less resistance. The Audi S5 Sportback B9 parts are T304L stainless steel with mandrel-bent tubing, which keeps the pipe at full size through each bend and resists corrosion for years. They bolt in place of the factory parts with no cutting or welding.

How to Choose

Choose the Part you need. Catless Cat Replacement Pipes has no catalytic converter. It is for off-road and track use only and needs an ECU remap. Catted 200-Cell HJS Race Cat Downpipe keeps a 200-cell high-flow catalytic converter made by HJS. Milltek recommends an ECU remap with it.

Pair them with the Milltek cat-back for the Audi S5 Sportback B9 for a complete Milltek exhaust.

Features

  • 63.5 mm (2.50 in) T304L stainless steel pipework
  • Mandrel-bent and made to bolt to the factory mounting points
  • Catted and catless options explained in How to Choose

What's Included

  • The Milltek parts shown for the version you choose

Specifications

Spec Value
Brand Milltek Sport
Part numbers (MPN) Catless Cat Replacement Pipes: SSXAU674. Catted 200-Cell HJS Race Cat Downpipe: SSXAU673
Type Downpipe
Material T304L stainless steel
Pipe diameter 63.5 mm (2.50 in)
Race product Yes, per Milltek. For off-road and track use

Fitment Notes

  • Fits the 2018-2024 US-market Audi S5 Sportback (B9 and B9.5), left-hand-drive cars.
  • Both are for off-road or track use only. They work with the factory or a Milltek cat-back.
  • Catless parts remove the catalytic converter. They are sold for off-road and competition use only and are not legal on public roads in the US.

Questions about fitment? Call (310) 231-0292 or text (310) 886-3111.

Year Make Model Chassis Engine
2018-2024 Audi S5 Sportback B9 / B9.5 3.0L TFSI Turbo V6
Fitment
YearMakeModel
2017–2026AudiS5 Sportback

Not sure? Text us your VIN and we’ll confirm.

Shipping & returns

Shipping: Orders ship via UPS, FedEx or USPS, from our facility near Los Angeles or directly from the manufacturer. Rates for many items are weight-based and shown at checkout. If you need it by a certain date, text us before you order.

Returns: Unused items in brand-new condition and original packaging can be returned within 30 days of the invoice date, with a 25% restocking fee unless otherwise specified. In some cases we can offer a lower fee with the balance as store credit. Shipping charges aren't refundable in either direction unless approved by AutoTalent.

Not returnable: special-order or custom items, and anything that has been installed, modified or altered.

Cancellations: free if the item is out of stock or we miss the ETA you agreed to. Other cancellations carry a 5% processing fee to cover card fees we can't recover. Special-order items can't be cancelled.

Damaged in transit? Report it to the carrier and to us within 48 hours, keep all packaging, and don't send anything back without our written approval.

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