BMW F97 X3M F98 X4M S58 Resonated Downpipes – IRL MaxFlow

The IRL MaxFlow Resonated Downpipes for the BMW F97 X3M and F98 X4M refine the sound of your S58 without giving up flow. Integrated resonators cut unwanted rasp and leave a deeper, smoother note.

Why you need it

Reducing factory exhaust backpressure lets the turbochargers spool faster, sharpens throttle response and unlocks extra horsepower and torque when paired with the proper ECU calibration. They work with the factory exhaust or an aftermarket cat-back.

Fits

• BMW F97 X3M (S58)
• BMW F98 X4M (S58)

Features

• Integrated resonators for a deeper, smoother exhaust tone
• Reduces rasp while keeping the aggressive S58 character
• Fully integrated stainless steel heat shields to reduce underhood temperatures
• Premium 304 stainless steel, precision TIG-welded with smooth mandrel bends
• CNC-machined flanges for OEM-style fitment
• Integrated flex sections absorb engine movement and reduce exhaust stress
• Direct bolt-on installation with no permanent modifications

Good to know

Intended for off-road and racing use only. A check engine light may occur depending on your vehicle's software calibration. Professional installation is strongly recommended.