BMW For G-Series BMW M3, M4, M2 X3M/X4M LCI Downpipes

Maximise your BMW S58 engine’s performance with G-Tech Motorsports 3.5” stainless steel deceit downpipes. These high-flow downpipes reduce backpressure, allow turbos to spool faster, and deliver sharper throttle response with a deeper, more aggressive exhaust tone.

Key Features & Benefits

• Material: SS304 aircraft-grade stainless steel, TIG welded for strength
  
  

• 3.5” mandrel-bent tubing for unrestricted flow
  
  

• Power gains: Improves mid-range torque and overall horsepower
  
  

• Faster turbo spool for sharper response
  
  

• Lower EGTs: Reduces exhaust gas temperatures and backpressure
  
  

• Aggressive sound: Deeper, motorsport exhaust tone
  
  

• Lightweight: Significant reduction vs OEM catalytic converters
  
  

• Installation: Includes gaskets and bolts for professional fitment
  
  

• Finish: Brushed stainless steel for clean motorsport appearance
  
  

• Warranty: Lifetime coverage for manufacturing defects
  
  

Vehicle Compatibility / Fitment

• BMW M3 G80 (2020+)
  
  

• BMW M3 Touring G81 (2020+)
  
  

• BMW M4 Coupe G82 (2020+)
  
  

• BMW M4 Convertible G83 (2020+)
  
  

• BMW M2 G87
  
  

• BMW X3M LCI
  
  

• BMW X4M LCI
  
  

Technical Specifications

• Material: SS304 stainless steel
  
  

• Diameter: 3.5” mandrel-bent tubing
  
  

• Welds: TIG precision welded in-house
  
  

• Finish: Brushed stainless steel
  
  

• Hardware: Gaskets and bolts included
  
  

• Weight reduction: Compared to OEM catalytic converters
  
  

Installation Information

• Tools required: Standard hand tools, torque wrench, exhaust jack or lift recommended
  
  

• Estimated install time: 2–3 hours
  
  

• Professional installation highly recommended
  
  

• Designed for motorsport or off-road use only
  
  

Performance Gains / Why It’s Needed

These downpipes remove the restrictive factory cats, improving exhaust flow and turbo efficiency. Faster spool and increased mid-range torque make the S58 engine more responsive, lower exhaust gas temperatures help reliability, and the lighter construction reduces overall vehicle weight. Perfect for track, spirited driving, or high-performance setups.

What’s Included in the Kit

• 2x G-Tech 3.5” stainless steel downpipes
  
  

• Gaskets and bolts for direct fitment
  
  

• Brushed stainless steel finish for professional appearance
  
  

Warranty & Guarantee

• Lifetime manufacturer warranty against defects
  
  

• Returns accepted for unused items in original packaging
  

Ideal BMW M3 M4 performance upgrade, S58 turbo upgrade, aftermarket downpipes, exhaust tuning. Pair with BMW cat-back exhausts or Eventuri intake systems for maximum performance.

FAQs

Q1: Will these work with stock exhaust?
Yes, they fit OEM flange positions and work with stock cat-back systems.

Q2: Do they fit aftermarket exhausts?
Yes, if the aftermarket system retains factory flange positioning.

Q3: Are they road legal?
These downpipes are designed for motorsport or off-road use only.

Q4: Is professional installation required?
Yes, professional fitting is strongly recommended due to high-temperature components.

Q5: What performance gains can I expect?
Faster turbo spool, sharper throttle response, lower EGTs, more torque, and a deeper exhaust tone.