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BMW 3 Series G20 304 Stainless Steel Downpipe 2019+Transform Your BMW 3 Series G20 with Premium 304 Stainless Steel Downpipe Ultimate B58 Performance Upgrade (2019+) Elevate your BMW's performance with our exclusive 304 stainless steel downpipe collection. Join thousands of discerning G20 M340i owners who have unleashed their B58 engine's true potential with precision engineered exhaust upgrades that deliver exceptional power gains, faster turbo response, and an aggressive exhaust note. 304 Stainless
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Transform Your BMW 3 Series G20 with Premium 304 Stainless Steel Downpipe - Ultimate B58 Performance Upgrade (2019+)

Elevate your BMW's performance with our exclusive 304 stainless steel downpipe collection. Join thousands of discerning G20 M340i owners who have unleashed their B58 engine's true potential with precision-engineered exhaust upgrades that deliver exceptional power gains, faster turbo response, and an aggressive exhaust note.

✓ 304 Stainless Steel ✓ 25-30HP Gains ✓ Hand-Crafted TIG Welded ✓ Bolt-On Installation

Experience the perfect fusion of performance engineering and premium materials with our meticulously crafted 304 stainless steel downpipe. Featuring hand-crafted TIG welding, smooth radius bends that eliminate turbulence, and precision CNC-machined flanges, this performance upgrade dramatically reduces back pressure while delivering faster turbo spool, significant horsepower gains, and an exhilarating exhaust note that unleashes your B58 engine's full potential.

Performance Benefits
  • Significant Power Gains - 25-30HP increase with proper ECU tuning unlocks B58 potential
  • Faster Turbo Spool - Reduced back pressure allows turbo to reach boost pressure more quickly
  • Enhanced Throttle Response - Improved exhaust flow delivers instant acceleration and improved drivability
  • Aggressive Exhaust Note - Deep, sporty soundtrack transforms your driving experience
Premium Construction
  • 304-Grade Stainless Steel - Superior corrosion resistance and exceptional durability for lasting performance
  • Hand-Crafted TIG Welding - Meticulous precision welding with back purging ensures leak-free operation
  • 4.5" Primary Diameter - Large-volume piping maximizes flow and minimizes back pressure
  • Smooth Radius Bends - Engineered bends decrease turbulence and optimize exhaust gas velocity
Vehicle Fitment
Model Generation Engine Year Drive Configuration
340i / 340i xDrive F30 / F31 B58 3.0L Turbo 2016-2018 RWD / AWD
M340i / M340i xDrive G20 / G21 B58 3.0L Turbo 2019+ RWD / AWD
Engineering Excellence
  • Precision CNC Flanges - Machined stainless steel flanges ensure perfect sealing and fitment
  • OEM Mount Locations - Utilizes factory mounting points for hassle-free bolt-on installation
  • Universal Compatibility - Fits both RHD and LHD models with no modifications required
  • Catback Compatible - Works seamlessly with stock exhaust and all aftermarket catback systems
Technical Specifications
  • Material Grade - Premium 304 stainless steel construction throughout
  • Primary Diameter - 4.5" for maximum flow and performance
  • Flange Material - CNC-machined 304-grade stainless steel
  • Welding Method - Professional TIG welding with back purging
  • Wall Thickness - 1.5mm for optimal durability and weight
  • Configuration - High-flow catless design for maximum performance
Package Contents
  • 1 Premium 304 Stainless Steel Downpipe Assembly
Important Installation Notice
TUNING REQUIRED: This high-flow catless downpipe will trigger a check engine light. ECU tuning is highly recommended to maximize power gains and eliminate error codes. Professional installation is strongly recommended for optimal results.
Installation Details
  • Installation Type: Bolt-on replacement for factory downpipe
  • Skill Level: Advanced - professional installation strongly recommended
  • Tools Required: Lift/jack stands, socket set, torque wrench
  • Time Required: Approximately 2-4 hours for complete installation
  • ECU Tuning: Required to eliminate check engine light and maximize gains
Performance Optimization
  • Maximum Flow Design - Removes restrictive factory catalytic converter for unrestricted exhaust flow
  • Reduced Back Pressure - Significantly lower exhaust restriction improves turbo efficiency
  • Quick Spool Characteristics - Enhanced turbo response delivers immediate power delivery
  • Tuning Synergy - Works harmoniously with Stage 1, 2, or 3 ECU tunes for maximum output
Durability & Quality
  • Corrosion Resistance - 304 stainless steel withstands extreme heat and environmental conditions
  • Professional Grade - Hand-crafted construction ensures leak-free operation and longevity
  • Heat Management - Premium stainless steel dissipates heat effectively for component protection
  • Track Proven - Tested under extreme conditions for reliability and performance
Expert Support & Warranty
  • Live Expert Assistance - Team of BMW performance specialists ready to provide technical guidance
  • Fitment Guarantee - Precision-engineered for perfect OEM fitment on all compatible models
  • Quality Assurance - Rigorous quality control ensures every downpipe meets exacting standards
  • Professional Installation Support - Comprehensive guidance for optimal installation and tuning
Shipping Information
  • Manufacturing + Shipping:  3-5 weeks to manufacture the product. 1-2 weeks for shipping
  • Tracking: Full tracking provided with every order
  • International Shipping: Available worldwide with calculated rates at checkout
  • Secure Packaging: Professional protective packaging ensures safe delivery of exhaust components
Our Promise To You

Every 304 stainless steel downpipe upgrade is backed by our commitment to excellence and customer satisfaction. Experience the perfect fusion of premium materials, precision engineering, and dramatic performance gains that transform your BMW G20 M340i into a true powerhouse. Unleash the full potential of your B58 engine with hand-crafted quality that delivers track-proven reliability and exhilarating performance.

Ready to unleash your B58's potential?

  1. Verify your vehicle compatibility (G20 M340i, F30 340i with B58 engine)
  2. Consider professional installation for optimal fitment and performance
  3. Plan for ECU tuning to maximize power gains and eliminate error codes
  4. Complete your order for priority processing and performance transformation

BMW 3 Series G20 304 Stainless Steel Downpipe 2019+

Item no : 45479865005
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US$ 650.00
Pay in 4 interest-free payments of $162.50 Learn more
Min. order: 1piece

Shipping Estimate
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Ships within 48 hours · Estimated delivery Jun 20 - Jun 25

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US$ 455.00

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Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy

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