BMW M5 F90 / M8 4.4T S63 Engine Exhaust Downpipe w/ Air Intakes

Upgrade your BMW M5 F90’s performance and sound with this high-flow Exhaust Downpipe + Cold Air Intakes Combo for the 4.4L Twin-Turbo S63 engine. Designed to unleash power, reduce backpressure, and enhance turbo response.

✅ Fitment Compatibility:

• BMW M5 F90 (2018–2023)

• Engine: S63 4.4L Twin-Turbo V8

• Transmission: Auto (ZF 8HP)

📦 Kit Includes:

1. Performance Catless or High-Flow Catted Downpipes

   • Material: T304 stainless steel or optional titanium

   • Mandrel-bent tubing for optimal flow

   • Precision TIG welds and laser-cut flanges

   • Improved turbo spool and aggressive exhaust note

   • Compatible with OEM and aftermarket exhaust systems

2. High-Flow Cold Air Intakes

   • Dual open-air cone filters or sealed carbon fiber boxes

   • Optional carbon fiber intake tubes

   • Increased airflow, enhanced turbo induction sound

   • Improves throttle response and top-end power

🔧 Performance Gains:

• +30–60 HP (depending on tune and setup)

• Sharper turbo response

• Louder, deeper exhaust tone

• Prepares your setup for Stage 2+ ECU tuning

⚠️ Notes:

• Tuning recommended for catless downpipes

• Check emissions compliance in your region

• May trigger CEL if not tuned

🏁 Optional Add-ons:

• Heat wraps or thermal coating for heat management

• O2 sensor spacers (for CEL mitigation)

• Carbon fiber intake boxes for added under-hood style

Want help choosing between catless vs catted or carbon vs aluminum intakes? I’ve got your back with pros and cons. Just let me know your goals — sound, performance, or emissions-safe daily setup!

We want you to have our parts as quickly as possible. Products that are in stock will be shipped and delivered domestically in 1–5 business days. It will take seven to twenty-one business days for international shipment. An email confirming that your order is being completed will be sent to you once you place it. For in-house orders, please allow a day for processing and the updating of the tracking number. The product page accurately shows the quantity.

Custom steering wheels typically take 20-25 business days for production, with an additional 5-7 business days for shipping. Production and delivery times may vary depending on the complexity of the order and the shipping destination. For more details, please refer to our Shipping Policy.

Our Return Policy permits returns only for products that are found to be defective. You have 30 days from the date of delivery to inspect the product and report any issues.

Regular Cleaning: Maintain carbon fiber parts by cleaning them regularly with a soft cloth and a mixture of mild soap and water. Avoid abrasive or harsh cleaners that could harm the finish.

Use Microfiber Pads and Cloths: Opt for microfiber pads and cloths when cleaning or applying protective coatings to prevent surface scratches.

Protect from Sun and Chemicals: Limit exposure to direct sunlight and harsh chemicals, as they can damage carbon fiber. When possible, use protective covers or park your vehicle in shaded areas.