Active Autowerke BMW X3M/X4M (F97/F98) PRE-LCI Equal Length Midpipe

The stock exhaust on the X3M and X4M often lacks the bold, resonant sound expected from a genuine M vehicle. Drawing from the expertise gained developing the first equal-length midpipe for the F8X and G8X M cars, Active Autowerke's Equal Length Midpipe corrects this by ensuring precise, even exhaust flow between banks, delivering a more aggressive and harmonically balanced tone than the factory system.

By mixing exhaust sounds earlier and over a longer period, this design produces a high-revving tone with richer resonance, restoring the sports car growl that genuinely defines the M badge. It's a bolt-on upgrade requiring only a single cut in each side of the factory midpipe, remaining fully reversible if you ever want to return to stock. Constructed from 100% 304 brushed stainless steel, the system is built for genuine durability with rust resistance backed by an industry-standard warranty. This midpipe is part of a complete exhaust solution for the X3M/X4M, offered as an alternative to Active Autowerke's Single Midpipe, alongside a valved rear axle-back exhaust and GESI catted downpipes.

Why Choose This Equal Length Midpipe

• Corrects exhaust bank imbalance for precise, even flow
• More aggressive, harmonically balanced tone than the factory system
• Mixes exhaust sounds earlier and for longer, richer resonance at high revs
• Bolt-on installation, only a single cut needed in each side of the factory midpipe
• Fully reversible, stock midpipe can be reinstalled if needed
• 100% 304 brushed stainless steel with industry-standard rust warranty
• Alternative to Active Autowerke's Single Midpipe for a different sound character

Compatibility

• BMW F97 X3M (Pre-LCI, 2019-2022)
• BMW F98 X4M (Pre-LCI, 2019-2022)

Important: this listing is specific to Pre-LCI models. For LCI X3M/X4M, you need the corresponding G8X-equivalent part instead. If you're unsure which generation your car is, confirm with your VIN before ordering.