Active Autowerke BMW N20 GESI G-Sport Cat Downpipe F2X 228i F3X 328i 428i

BMW’s N20 engine, introduced in the F2X 228i, F3X 328i, and 428i, offers a strong balance of efficiency and power, but the restrictive factory downpipe limits its full potential. The Active Autowerke BMW N20 GESI G-Sport Cat Downpipe is engineered to optimize exhaust flow, enhance turbo spool, and increase horsepower for an immediate performance boost. By eliminating the bottlenecks of the OEM downpipe, this high-performance upgrade allows for quicker acceleration, improved throttle response, and a more aggressive exhaust note.

Constructed from premium 3.5-inch stainless steel piping, this durable and high-flow downpipe is built to withstand extreme temperatures and high-boost applications, making it an ideal choice for both street and track enthusiasts. This variant includes a 4-inch ultra high-flow GESI G-Sport HO-Series catalytic converter, ensuring maximum exhaust flow while eliminating Check Engine Lights (CELs). Made entirely from 304 stainless steel, including the substrate, this N20 GESI G-Sport Cat Downpipe utilizes proprietary precious metal loading technology to reduce emissions while maintaining high-flow capacity, outperforming stock catalytic converters in both performance and reliability.

Designed to support engines producing between 500 and 850 horsepower, the GESI HO-Series catalytic converter significantly reduces back pressure, enabling faster turbo spool, increased power output, and sharper throttle response. Unlike factory downpipes that restrict airflow and limit performance, this upgrade ensures a seamless and efficient exhaust flow, delivering higher power potential without unnecessary restrictions.

For those seeking the ultimate performance enhancement for their BMW F2X 228i, F3X 328i, or 428i, the Active Autowerke N20 GESI G-Sport Cat Downpipe provides exceptional power gains, optimized turbo efficiency, and an aggressive exhaust note while maintaining durability and long-term reliability. Experience smoother power delivery, sharper throttle response, and a true performance upgrade every time you hit the gas.

KEY FEATURES:

• NO CEL for catalytic efficiency when using this downpipe
• Designed to be as unrestrictive as possible
• GESI EPA registered high flow and fully OBD2 compliant
• High flow 4″ GESI cat with 3.50″ piping allows for maximum power output
• Quicker turbo spool – improved power over stock
• Rated for 350 to 500 hp applications
• Withstands up to 1500 F
• Can reach operational efficiency within 9 seconds of startup
• Easily bolts-on no cutting or welding required
• Durable construction from TIG welded 304 stainless steel
• Precise fitment
• Modular design for later upgrades
• Made in Miami, Florida
• Ultra high flow 400 cell per square inch catalyst
• EPA compliant for use on OBD2 vehicles (1996 and newer) except in California
• Full 304 stainless steel construction
• 304 stainless steel substrate in the catalytic converter is furnace braised to the mantle for outstanding durability
• GESi proprietary precious metal loading technology ensures greatly reduced emissions
• Covered by 5 Year / 50,000 Mile Warranty (on shell and tube ends) and 2 year / 25,000 Mile Warranty on the Catalytic core to original purchaser only – NOTE: warranty will be null and void if your car has excessive burble (greater than stock) as that physically destroys the catalytic core
  Ideal for Forced Induction Applications with no loss of HP

APPLICATIONS

• 2014-2016 BMW N20 F22/F23 228i
• 2012-2018 BMW N20 F30/F31 328i
• 2014-2016 BMW N20 F32/F33/F36 428i

NOTES:

Due to potential variations in exhaust system fitment, professional installation is recommended for optimal results.

THIS DOWNPIPE WILL NOT FIT A N26 ENGINE.