LAB StealthFlow™ NO-CEL 200-Cell High-Flow Catted Downpipes — G87 M2 / G80 M3 / G82 M4

🔥 Guaranteed No Check Engine Light — No O₂ Spacers Needed
📦 In Stock & Ships From California in 1–2 Business Days

Unlock the full character of your S58 engine with the perfect balance of performance, sound, reliability, and drivability. The LAB StealthFlow™ 200-Cell Downpipes are engineered for enthusiasts who want more power and a deeper exhaust tone—without triggering a check engine light or requiring coding, tuning, or spacers.

Designed specifically for the G87 M2, G80 M3, and G82/G83 M4, these downpipes deliver an OEM-plus experience with noticeable gains in throttle response, turbo spool, and refinement.

🚀 Why StealthFlow™ Is Different

✔ Guaranteed NO CEL — Precision sensor placement and flow engineering eliminate the need for tuning or spacers.
✔ 200-Cell High-Flow Catalyst — Maximizes exhaust flow while maintaining emissions control hardware.
✔ Integrated Thermal Heat Shield — Reduces radiant heat, protects engine components, and supports repeatable performance.
✔ OEM-Perfect Fitment — Bolts directly to factory or aftermarket exhaust systems.
✔ Enhanced Sound Profile — Deeper, throatier tone with zero rasp and refined cold starts.

🧩 Key Features

• 304 stainless steel construction

• CNC-machined flanges

• TIG-welded and pressure-tested

• Factory mounting points retained

• Fully plug-and-play installation

• Works with stock or aftermarket exhaust systems

📈 What You’ll Feel & Hear

• Faster turbo spool

• More responsive power delivery

• A richer, more aggressive exhaust note

• Coupe-worthy performance without compromises

• OEM drivability — zero warning lights

📌 Fitment

⚠️ Installation Notes

Professional installation is recommended.

🛑 Emissions & CARB Disclaimer

This product is NOT CARB-compliant and is intended for off-road, race, or competition use only.
Not legal for sale, installation, or use on vehicles registered for on-road use in the state of California or other regions that adopt CARB emissions standards.

By purchasing and/or installing this product, the customer acknowledges and assumes all responsibility for compliance with applicable emissions regulations.

🏁 The Upgrade BMW Should’ve Built

More flow. More sound. No warning lights.
If you want the cleanest driving experience with zero compromises — StealthFlow™ is the new standard.