BMW X3M/X4M Race Downpipes

BMW X3M/X4M Race Downpipes

Boost your S58 with race-engineered downpipes built for uncompromised airflow and real power gains. Designed by Momentum Motorsports for enthusiasts who want sharper spool, louder tone, and the most efficient exhaust path from the turbos back

Applications

• BMW X3M

• BMW X4M

• Engine: S58 3.0L Twin-Turbo

Key Features

• Race non-catted configuration for maximum flow

• Mandrel-bent stainless steel tubing

• Reinforced flex section for stress + vibration handling

• Precision TIG/MIG hand-welded

• OEM fitment using factory mounting points

• Direct replacement for restrictive stock downpipes

Why It Hits Different

• Faster + louder turbo spool

• Reduced back pressure = better throttle response

• Increased exhaust velocity for improved boost efficiency

• Noticeable performance jump when tuned

• The tone becomes raw, deep, and unapologetic

Perfect Pairings

• Stage 2 ECU to maximize gains 

• Non-resonated or performance midpipes

• Stainless or Titanium cat-back systems
  

Installation

• 100% Bolt-on

• No cutting required

• Retains OEM sensors + placement

Disclaimer

• Intended for off-road / race use only

• Buyer responsible for checking local emissions + sound laws