BMW F97 X3M F98 X4M S58 Catted Downpipes, 200 or 400 Cell

The IRL MaxFlow Catted Downpipes for the BMW F97 X3M and F98 X4M come in 200 Cell Race and 400 Cell High Flow versions, built from 304 stainless with fully integrated heat shields.

Why you need it

Lower exhaust backpressure lets the turbochargers spool faster and raises horsepower, torque and throttle response. The integrated heat shields cut underhood temperatures and protect surrounding components.

Choose your cell count

• 200 Cell Race: maximum flow and the most aggressive, exotic exhaust note.
• 400 Cell High Flow: a balance of performance, cleaner sound and better emissions performance than the 200 cell version.

Fits

• BMW F97 X3M
• BMW F98 X4M

Features

• Premium 304 stainless steel, TIG-welded, mandrel-bent
• CNC-machined flanges for OEM-quality fitment
• Fully integrated stainless steel heat shields
• Direct bolt-on installation

Good to know

The 400 cell version reduces the likelihood of a check engine light, but IRL does not offer a No Check Engine Light guarantee on it. Intended for off-road and closed-course racing use only.