If you’re looking to really wake up your 2025+ BMW M5 (G90), let me tell you about this Sports Series High Flow Metallic Catted Downpipe. I’ve seen firsthand how much of a difference it can make, especially if you’re running a turbocharged setup. The stock exhaust system? It’s got a lot of restrictions that hold back horsepower and torque, and the factory catalytic converter is a big part of that problem.

Picture this: the factory cat has these tiny honeycomb structures that exhaust gases have to squeeze through. It’s like trying to push a big crowd through a narrow doorway—there’s bound to be some backup. This not only restricts flow but also creates turbulence, which is the last thing you want when you’re trying to maximize performance. Swapping it out for our downpipe is like opening up those doors wide; you’ll feel the power surge!

What’s cool about our downpipe is the 200 cell metallic core. Fewer cells mean bigger openings for the exhaust gases to flow through, which translates to less restriction. And let’s be real: less restriction means more power, quicker turbo spool-up, and a snappier throttle response. It’s all about that immediate kick you get when you hit the gas. You want your car to feel alive, and this is how you do it.

Now, if you’re wondering about durability, the metallic catalytic converter is a solid upgrade over the stock ceramic one. It can handle higher temperatures and is built to last longer. Plus, it’s lighter, which is always a bonus when you’re looking to shave off some weight.

For the BMW M5 G90, you’ve got a total of four cats to deal with—two primary and two secondary. Our downpipe replaces the primary catalytic converter with our high-flow option and deletes the secondary ones altogether. This means you’re getting a serious upgrade in flow and performance.

Here’s what you can expect:

• High Flow 200 cell metallic catalytic converter for maximum performance
• Boosted horsepower and torque curves that hit harder and faster
• Improved throttle response and quicker turbo spool-up times
• Mandrel bent 3" piping for a smooth transition to your exhaust system
• 100% stainless steel construction for durability
• 100% TIG welded for top-notch quality
• Precision CNC machined turbocharger V-Band flange for a perfect fit
• Available in a mirror polish or brush finish to match your style
• Optional high-temperature black thermal coating to keep under-hood temps down
• Retains the factory slip-on style connection for easy installation
• Compatible with both factory and aftermarket exhaust systems
• Tested for durability on the track
• Includes all necessary hardware for a complete install
• Limited lifetime warranty for peace of mind

So if you’re ready to unleash the beast in your M5, this downpipe is a no-brainer. It’s designed specifically for the BMW M5 G90 with the S28 engine, and it’s going to make your driving experience a whole lot more thrilling.