When it comes to upgrading your BMW, the Active Autowerke F-Chassis N20 Signature downpipe is a game changer. This isn’t just another aftermarket part; it’s a solid piece of engineering that really understands what your ride needs. With its hefty 3.5-inch stainless steel piping, you can expect more power and a quicker turbo spool, which means your car will respond like a dream. Plus, it’s built to last, so you won’t be worrying about durability anytime soon.

One of the standout features is the 4-inch GESI ultra high-flow catalytic converter. This isn’t just any cat; it’s designed to keep your check engine light off, which is a huge relief. The GESI G-Sport Ultra High Output Catalytic Converter is made from full 304 stainless steel, and it’s not just tough—it’s also EPA registered and compliant in 49 states, which means you can hit the road without any worries about emissions. The proprietary precious metal loading technology is a game changer for reducing emissions, so you can enjoy the extra power without feeling guilty about the environment.

• No more worrying about that pesky CEL—this downpipe keeps it off.
• It’s designed to be as unrestrictive as possible, allowing your engine to breathe freely.
• The GESI cat is high flow and fully OBD2 compliant, making it a smart choice for modern vehicles.
• With a 4-inch GESI cat paired with 3.5-inch piping, you’re looking at maximum power output.
• Experience quicker turbo spool and improved power over stock setups.
• Rated for applications up to 500 hp, so it’s ready for serious performance.
• Built to withstand temperatures up to 1500°F, you know it can handle the heat.
• Reaches operational efficiency in just 9 seconds after startup.
• Installation is a breeze—no cutting or welding required; it bolts right on.
• Constructed from TIG-welded 304 stainless steel for durability.
• Enjoy precise fitment thanks to its thoughtful design.
• The modular design means you’re set up for future upgrades.
• Made right here in Miami, Florida, supporting local craftsmanship.
• Features an ultra-high flow 400 cell per square inch catalyst for optimal performance.
• EPA compliant for OBD2 vehicles (1996 and newer), except in California.
• The substrate in the catalytic converter is furnace braised to the mantle for outstanding durability.
• The 5 Year / 50,000 Mile Warranty on the catalytic converter gives you peace of mind.
• Perfect for forced induction applications without sacrificing horsepower.
• Both drivers and passengers will be safe from harmful emissions and noise.

Fitment:

• BMW N20 F3X M228I 328I 428I (2011-2017)

Note: Just a heads up—federal law prohibits tampering with emissions control devices. However, the Mobile Source Enforcement Memorandum 1A allows for aftermarket parts to be used as long as emissions aren’t negatively impacted. The GESI catalytic converter meets EPA standards but not CARB regulations.

Product Fitment:

• BMW 328i (2011-2016)
• BMW 428i (2013-2016)

If you're serious about performance, this downpipe is a no-brainer. It’s all about getting the most out of your BMW without the headaches. Trust me, once you’ve got this installed, you’ll feel the difference.