Active Autowerke - Downpipes w/ GESI G-Sport Cats || S55 (M2C/M3/M4)

For BMW F80 M3, F82 M4, F87 M2 Competition
49-State Legal – No CEL – GESI Gen 2 EPA-Compliant

For over 30 years, Active Autowerke has been a trusted leader in high-performance BMW upgrades. Designed specifically for the BMW F87 M2 Competition, F80 M3, and F82 M4, these 4" GESI Gen 2 High-Flow Catted Downpipes deliver the performance, quality, and reliability Active Autowerke is known for—without triggering a Check Engine Light (CEL).

Built with precision TIG-welded 304 stainless steel and featuring EPA-registered GESI High Output (HO) catalytic converters, these downpipes drastically reduce back pressure, improve spool times, and allow for higher boost levels—all while staying emissions compliant in 49 states.

✅ Key Features:

• NO CEL – GESI Gen 2 Advanced cats prevent catalytic efficiency errors

• Quicker Turbo Spool & Throttle Response

• Increased Low-End Torque and Mid-Range Power

• 4” Ultra High-Flow GESI HO Catalytic Converters (400 CPSI)

• EPA Registered & 49-State Legal

• Fully OBD2 Compliant (1996+)

• Supports 500–850 HP Applications

• Durable 304 Stainless Steel Construction – Substrate and tubing

• Casted Stainless Steel V-Band Flange – Ensures precise OEM-like fit

• Withstands up to 1500°F operating temps

• Bolts on Easily – No cutting or welding required

• Accepts OEM O2 Sensor Heat Shield

⚠️ NOT LEGAL for Use in California

Due to California Vehicle Code Sections 27156 & 38391, these downpipes are not CARB-compliant and cannot be installed on vehicles registered in California.

🛡️ Warranty Coverage:

• 5-Year / 50,000 Mile Warranty on shell and tube ends

• 2-Year / 25,000 Mile Warranty on catalytic converter core

📦 What’s Included:

• (2) Active Autowerke Catted Downpipes (Driver & Passenger Side)

• Integrated GESI Gen 2 Advanced High Output Catalytic Converters

• All necessary hardware for installation

🛠️ Vehicle Fitment:

• BMW F87 M2 Competition (S55 Engine)

• BMW F80 M3 (2015–2018)

• BMW F82 M4 / F83 M4 Convertible (2015–2020)

Upgrade your F8X BMW’s performance while staying emissions-friendly with Active Autowerke’s GESI Catted Downpipes—engineered for power, precision, and peace of mind.

Made in Miami, Florida – Backed by over 30 years of BMW tuning excellence