Milltek Large-bore Downpipe and De-cat Requires a Stage 2 ECU remap for Audi RSQ8 4.0 V8 Bi-Turbo (OPF / GPF Equipped Models)

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.

Please note: de-cat and sports cat systems are for off-road / motorsport use only and would inhibit your vehicle from passing an MOT test. Only EC type-approved components are legal and fit for road use.

Specification

• System Type: Large-bore Downpipe and De-cat
• Additional: Requires a Stage 2 ECU remap
• Pipe Diameter: 76.2mm (3")
• EC Approved: No
• Race System: Yes
• Estimated Fitting Time: 3.50 to 4.50 hours
• GTIN: 5056214723629

Compatible Vehicles

• Audi RSQ8 4.0 V8 Bi-Turbo (OPF / GPF Equipped Models) — 2020 onwards
• Audi SQ7 4.0 V8 TT (Petrol OPF/GPF Equipped Vehicles Pre Facelift) — 2021–2024
• Audi SQ8 4.0 V8 Bi-Turbo (Petrol OPF / GPF Equipped Models Pre Facelift) — 2020–2024

Vehicle Fitment

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📦 Regal Autosport Shipping FAQs

Where do you ship to?

We ship across the UK, Europe, the USA, Australia, South East Asia, and worldwide.
 There are no regions we restrict shipping to.

Which carriers do you use?

• UK orders: Royal Mail (small items), DPD Local (parcels up to 30kg)
  
  

• International orders: Royal Mail (small packages) or DHL Express (larger parcels)
  
  

How long will my order take to arrive?

• UK deliveries: Typically 1–2 business days after dispatch.
  

• International deliveries: Usually 2–15 business days, depending on location.
  

Please note: We do not ship on weekends or UK Bank Holidays.

When will my order be dispatched?

Orders placed before 2 PM are usually dispatched the same business day.
 Orders placed after 2 PM are processed on the next working day.

How much does shipping cost?

Shipping costs are calculated at checkout based on the volumetric weight of your items.
 We do not offer free shipping — instead, we keep our product prices as competitive as possible.

Will I receive tracking information?

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Do I have to pay customs charges or import taxes?

• UK Customers: Prices include UK VAT.
  

• International Customers:
  

• We deduct UK VAT at checkout.
  

• You are responsible for any local customs duties, import taxes, or fees.
  

Delivery times may be affected by customs clearance, and time is not of the essence for international deliveries.

What happens if my order is lost or damaged?

• If your shipment is lost, we will re-ship your order once the courier confirms the loss.
  

• If your order is damaged, we will work with you to file a courier claim and either replace the item or offer a discount based on the situation.
  

Please inspect your delivery upon arrival and contact us immediately if there are any issues.

What if my item is on backorder?

Orders containing backordered items will be held until all items are available.
We do not split ship orders. If you require partial delivery, please place separate orders for in-stock and backordered items.

Can I collect my order in person?

We do not offer local pickup or local delivery for online orders due to security verification.
However, you are welcome to visit our store and pay via chip and PIN if you wish to purchase in person.