The all-new BMW G90 M5 has introduced an exciting new chapter for BMW M enthusiasts. Powered by the twin-turbocharged S68 V8, it delivers incredible performance straight from the factory while offering plenty of room for personalization.

For many owners, however, the first modification isn't about chasing maximum horsepower—it's about unlocking the sound the S68 was meant to produce.

That's exactly what the MAD Secondary Catless Downpipes were designed to do.

Now available at XPH, these direct-fit secondary downpipes offer a simple way to increase exhaust flow, amplify the character of the S68, and achieve a noticeably more aggressive exhaust note—all without replacing the factory primary catalytic converters.

Bigger Sound Without the Typical Headaches

One of the biggest concerns enthusiasts have when upgrading exhaust components is the possibility of triggering a Check Engine Light.

Traditional primary catless downpipes often require additional tuning or calibration to avoid fault codes.

MAD takes a different approach.

By replacing only the factory secondary catalytic converters while leaving the primary catalysts in place, these downpipes significantly improve exhaust sound while allowing the factory emissions monitoring system to continue operating as intended.

The result is one of the easiest ways to make the G90 M5 sound substantially more aggressive without the CEL concerns commonly associated with primary downpipe upgrades.

Let the Twin-Turbo V8 Speak

The S68 is an impressive engine, but factory exhaust restrictions naturally soften much of its personality.

Installing the MAD Secondary Downpipes helps reveal more of what lies underneath.

Drivers can expect:

• A deeper, more pronounced exhaust tone
• Increased turbo whistle
• Sharper exhaust character during acceleration
• Improved exhaust flow
• Reduced backpressure
• Minimal additional cabin drone during normal driving

Rather than overwhelming the car, the upgrade gives the S68 a more authentic performance voice that better reflects its capabilities.

The Perfect First Exhaust Upgrade

Not every enthusiast is ready to install a complete exhaust system or replace the primary downpipes immediately.

That's what makes secondary downpipes such an attractive option.

They provide meaningful improvements in sound and flow while remaining compatible with both the factory exhaust system and most aftermarket cat-back systems.

For owners planning a long-term build, they also serve as an excellent stepping stone toward a more comprehensive exhaust package in the future.

Premium Construction Built for Performance

Every MAD Secondary Downpipe is engineered specifically for the G90 M5 platform using high-quality materials designed to withstand the demanding environment of a twin-turbo V8.

Key features include:

• Heavy-duty 304 stainless steel construction
• 2.0mm wall thickness
• Precision TIG welding
• Back-purged welds for maximum strength
• Smooth internal transitions for improved flow
• OEM-style flanges and mounting points
• Direct bolt-on installation
• Limited Lifetime Warranty

The result is a durable, high-quality upgrade designed to perform for years of spirited driving.

Pair with Primary Downpipes for the Ultimate S68 Exhaust System

For enthusiasts pursuing maximum performance, the secondary downpipes integrate seamlessly into larger exhaust builds.

Primary downpipes deliver the largest horsepower and torque gains, while the secondary downpipes further reduce restriction and dramatically enhance the exhaust note.

Installed together, they create one of the least restrictive exhaust configurations available for the S68-powered G90 M5, making them an ideal combination for high-performance builds.

Designed Exclusively for the G90 M5

Unlike universal exhaust components, the MAD Secondary Downpipes were engineered specifically for the latest-generation M5.

Vehicle fitment includes:

• 2025+ BMW G90 M5 (S68)

Please note that these downpipes are not compatible with other S68-powered BMW models such as the X5, X6, X7, or XM.

Available Now at XPH

If you're looking for one of the most effective ways to unlock the sound of your G90 M5 without replacing the primary catalytic converters, the MAD Secondary Catless Downpipes deliver an outstanding balance of performance, tone, and simplicity.

With improved exhaust flow, a deeper V8 soundtrack, increased turbo presence, and straightforward installation, they're an excellent upgrade for enthusiasts who want to hear more from the S68 every time they press the accelerator.

Shop the MAD BMW S68 Secondary Downpipes for the G90 M5 today at XPH: https://x-ph.com/mad-bmw-2024-s68-secondary-downpipes-g90-g99-m5-mad-154/