Description
The Evolution Racewerks Sports Series Resonated Mid Pipes are engineered to increase exhaust flow, improve throttle response, and enhance torque delivery for the S58-powered 2020+ BMW X3M and X4M. These mid pipes replace the restrictive factory resonators with high-flow resonated units designed to maintain a refined, near-OEM exhaust tone while unlocking measurable performance gains.
Manufactured entirely in-house in the USA, these mid pipes utilize mandrel-bent stainless steel tubing, precision CNC-machined flanges, and TIG-welded construction for maximum durability and perfect fit. Designed specifically for enthusiasts seeking better performance without excessive exhaust volume, this resonated setup offers the ideal balance between sound control and improved flow.
Fitment Information
Direct fit for the following S58-equipped vehicles:
- BMW X3M (F97): 2020+
- BMW X4M (F98): 2020+
Replaces factory mid pipes.
Compatible with OEM exhaust systems and aftermarket exhausts designed to mate with the factory mid pipe layout.
Key Features
- Made in the USA and manufactured in house
- Designed for 2020+ BMW X3M/X4M S58 engines
- Increases maximum horsepower potential
- Stronger initial torque curve for faster, more responsive acceleration
- Faster turbo spool and noticeably improved throttle response
- Retains factory H-crossover configuration to prevent droning
- Resonated design for a quieter, refined tone while increasing exhaust flow
- Mandrel-bent 2.75-inch (70 mm) stainless tubing for smooth, unrestricted flow
- 100 percent stainless steel construction
- 100 percent TIG-welded for strength and weld quality
- Precision CNC-machined stainless steel flanges
- Brushed stainless finish
- Compatible with factory or aftermarket exhaust systems
- Track-tested for reliability under high-load conditions
- Includes all installation hardware
- Limited Lifetime Warranty
Performance Benefits
Turbocharged engines rely heavily on efficient exhaust flow. The factory resonators introduce turbulence and backpressure, limiting power potential and delaying turbo response. The Evolution Racewerks Sports Series Resonated Mid Pipes eliminate these restrictions with free-flow resonators and consistent mandrel-bent pipe diameter, resulting in:
- Higher horsepower capability
- Faster and stronger torque delivery
- Quicker turbo spool
- Improved throttle response
- Reduced backpressure throughout the exhaust system
The resonated configuration keeps sound levels controlled, making it ideal for daily driving or for vehicles already equipped with aggressive aftermarket components.
H-Style Crossover Design
Evolution Racewerks integrates an H-pipe crossover, chosen after extensive testing comparing H-style and X-style layouts on the S58 platform. The H-crossover provides:
- Reduced interior drone
- Smoother exhaust pressure equalization
- Better low-end torque characteristics
- A refined, balanced exhaust tone
BMW’s factory mid pipe also uses an H-style crossover, confirming it as the optimal design choice for overall drivability and sound quality.
Premium Construction
These mid pipes are built from 304 stainless steel and mandrel-bent for consistent diameter throughout the system. Every weld is executed by in-house fabricators using TIG welding to ensure durability and clean craftsmanship. CNC-machined billet stainless flanges guarantee precise fitment and sealing. The factory bracket hanger is retained, laser-cut, and TIG welded in stainless steel for OEM-style support. High-quality exhaust clamps connect the mid pipes to the rear muffler section.
