Untd. Performance Catted W/Shield Downpipe – BMW X3M X4M F97 F98 3.0T S58

Transform your BMW X3M or X4M into a sharper, faster, and more aggressive machine with the Untd. Performance Catted Downpipe w/ Heat Shield. Built for the F97 and F98 platforms powered by the formidable 3.0L twin-turbo S58 engine, this downpipe delivers increased flow, improved turbo response, and a refined exhaust tone—while incorporating a high-flow catalytic converter and integrated thermal shielding for a street-friendly setup.

Key Features:

High-Flow Catted Design
This downpipe features a 200-cell high-efficiency catalytic converter that replaces the factory restriction, offering a perfect balance of performance and emissions-conscious engineering. Whether you’re daily driving your X3M or carving corners in your X4M, you’ll enjoy faster spool, better throttle response, and more usable power across the RPM range—all while minimizing odor and potential CELs (when tuned properly).

Integrated Heat Shield for Thermal Control
Engineered with a built-in heat shield, this downpipe protects nearby components from excessive heat while reducing engine bay temperatures. The added thermal management is ideal for spirited driving, performance builds, and maintaining consistent turbo performance under load.

Refined Performance Sound
The catted design produces a deeper, more pronounced exhaust note that complements the S58’s aggressive character—without overwhelming drone. Expect a sportier, race-inspired tone with noticeable turbo spool and subtle pops, perfect for performance-minded daily drivers.

Dyno-Tested Gains with Enhanced Response
By improving exhaust gas evacuation and reducing backpressure, this downpipe allows your turbos to operate more efficiently—delivering quicker throttle input, improved torque, and higher peak horsepower. When paired with ECU tuning, gains are even more impressive and fully optimized for your X3M or X4M.

Built to Handle Boost
Constructed from TIG-welded 304 stainless steel and engineered for high heat and pressure environments, this downpipe is designed for long-term reliability. CNC-machined flanges ensure a precise, leak-free fit for your F97 or F98.

Direct Bolt-On Installation
With its OEM-style fitment, the Untd. Performance Catted Downpipe bolts directly to your factory turbo and mid-pipe without the need for cutting or welding. It’s a seamless upgrade that installs cleanly and performs consistently.

Compatibility:

• BMW X3M F97 (2020–2023)

• BMW X4M F98 (2020–2023)

• Engine: S58 3.0L Twin-Turbo Inline-6

✅ Best results achieved with aftermarket ECU tuning. Compatible with most popular tune platforms.

For drivers who want to unlock real power and sound without sacrificing drivability or thermal control, the Untd. Performance Catted Downpipe w/ Heat Shield is the ideal upgrade for your BMW X3M or X4M. Built to handle the power of the S58 while staying refined enough for the street.

⚠️ Note: While this product features a high-flow catalytic converter, it is not guaranteed to be emissions-compliant in all regions. Please verify your local regulations before purchase and installation. Intended for off-road and motorsport use.