If you’re looking to unleash the true potential of your twin turbo S63 engine, you’ve got to check out our Sport Series High Flow Catted Downpipes. Trust me, this isn’t just another upgrade; it’s a game changer. Those factory exhaust systems? They can really choke off the horsepower and torque, especially on turbocharged setups like yours. The stock catalytic converter is a major bottleneck in the system, and it’s time to kick it to the curb.

The factory cat is made up of this honeycomb structure that exhaust gases have to squeeze through, creating all sorts of turbulence and restriction. By swapping it out for our High Flow Metallic Catted Downpipe, you’re opening the floodgates. Seriously, this upgrade lets your engine breathe easier, which means more power and torque right off the bat.

We’ve designed these downpipes with a 200 cell metallic core. Why does that matter? Well, fewer cells per square inch mean bigger openings for the exhaust gases to flow through. Less restriction equals quicker turbo spool-up and snappier throttle response. You’ll notice the difference in how your car feels on the road—faster, smoother, just better.

Durability is key, and that’s why we chose 100% 304 grade stainless steel for construction. Plus, our mandrel bent piping ensures smooth transitions to your exhaust system, so you won’t have to worry about any kinks or bends that could disrupt flow. Every piece is TIG welded by our skilled in-house fabricators right here in the USA, so you know you’re getting quality craftsmanship.

We’ve even replicated the factory turbocharger turbine housing’s 3.5” V-Band flange using CNC machined billet stainless steel. And yes, we’ve kept the O2 sensor in its original position for a straightforward, bolt-on installation—no fuss, no compatibility issues, whether you’re sticking with the factory exhaust or going aftermarket.

These downpipes come with a brushed finish by default, but if you’re looking for something a bit slicker, we also offer a mirror polish or a high-temperature black thermal coating to help keep those underhood temps in check.

Features:

• Made in the USA! Manufactured in-house.
• Now available for the 2016-18 M550i/M850i S63 Engines!
• High Flow 200 cell metallic catalytic converter.
• Higher max horsepower and torque curve—feels good right away.
• Improved throttle response and faster turbo spool-up times.
• Mandrel bent 3” piping for smooth exhaust flow.
• 100% stainless steel construction for durability.
• 100% TIG welded for top-notch quality.
• Precision CNC machined turbocharger V-Band flange.
• Retains factory donut style gasket for easy fitment.
• Available finishes: mirror polish or brushed.
• High-temperature black thermal coating option to reduce underhood temps.
• Compatible with both factory and aftermarket exhaust systems.
• Track tested for durability and performance.
• Includes all necessary hardware for complete installation.
• Limited Lifetime Warranty for peace of mind.

Fitments:

• BMW M550i G30 2016-2018
• BMW M850i G14 | G15 | G16 2016-2018

So if you’re ready to take your ride to the next level, these downpipes are a solid choice. They’re designed to fit perfectly with your BMW, and with the performance benefits they bring, you’ll wonder how you ever lived without them.