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!