BMW F9x S58 Single Mid Pipe with Extended Underbrace – X3M & X4M Pre-LCI | Gtech Motorsports

Transform the sound and response of your BMW S58 engine with the Gtech Motorsports single mid pipe for F97/F98 X3M and X4M Pre-LCI models. It replaces the restrictive factory mid pipe with a smoother-flowing 304 stainless system for a deeper exhaust tone and sharper throttle response while maintaining OEM-level fitment.

Key Features & Benefits:

• 304 stainless steel construction for durability and corrosion resistance
• TIG welded for strength under extreme temperatures and pressure
• Extended underbrace integrates seamlessly with OEM suspension and chassis components
• Refined exhaust tone that eliminates harsh rasp, producing a deeper and more aggressive sound
• OEM-style brackets, mounts, and ball flanges for a direct bolt-on installation
• Improved throttle response and flow for measurable power gains

Vehicle Compatibility / Fitment:

• Engine: BMW S58 | Chassis: F97/F98 | Models: X3M & X4M Pre-LCI
• BMW X3M F97 Pre-LCI
• BMW X3M Competition F97 Pre-LCI
• BMW X4M F98 Pre-LCI
• BMW X4M Competition F98 Pre-LCI

Technical Specifications:

• Material: 304 stainless steel
• Construction: 100% TIG welded

• Finish: Brushed stainless

• Design: Single mid pipe with extended underbrace

• Fitment: OEM-spec ball flanges and mounts

Installation Information:

• Tools required: Standard exhaust tools and torque wrench
• Install time: Approx. 2–3 hours
• Recommended: Professional installation for best fitment and alignment

Performance Gains / Why It’s Needed:

The factory S58 mid pipe produces a buzzy, raspy tone that hides the true character of the engine. Gtech’s single mid pipe improves flow for stronger midrange torque and faster throttle response while delivering a deeper, more refined exhaust note. Ideal for spirited road driving or track use.

What’s Included:

• 1x Gtech stainless steel single mid pipe with extended underbrace
• OEM-style flanges, brackets, and mounting hardware

Warranty & Guarantee:

Comes with manufacturer warranty. Returns accepted on unused products in original packaging.

FAQs:

Q: Will this fit Post-LCI models?
A: No, this mid-pipe is designed for Pre-LCI X3M and X4M models.

Q: Does it affect MOT or emissions?
A: For EU OPF-equipped cars, coding or ECU tuning is required. Motorsport use only.

Q: What sound difference can I expect?
A: A deeper, more refined tone with reduced rasp compared to stock.

Q: Is professional installation necessary?
A: While it is a bolt-on, professional installation ensures perfect fit and alignment.