BMW GEN3 B58N 400 Cell Catted Downpipes
$2,873.00
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SKU:
BMW.B58.GEN3.FF.400C.BR
BMW GEN3 B58N 400 Cell Catted Downpipes
Free Shipping to the 48 Contiguous States
$2,873.00
BMW GEN3 B58– EPA-Compliant 400 Cell Catted Downpipes
Engineered for the Gen 2 B58 Turbocharged Inline-6 • High-Flow • Compliant •
Introducing Our NEW 400 Cell EPA-Compliant Downpipes for the GEN3 B58 Platform
The Gen 2 B58 (B58N) turbocharged inline-6 is one of BMW’s most capable modern engines, known for its immense tuning potential and smooth power delivery. However, factory catalysts restrict exhaust flow and limit turbo efficiency. Our NEW EPA-compliant 400 cell high-flow catted downpipes are engineered to reduce backpressure, improve turbo spool characteristics, and unlock a deeper, more aggressive exhaust tone — all while maintaining emissions compliance standards.
This upgrade lays the foundation for increased performance on both stock and tuned vehicles.
Why Upgrade to 400 Cell?
- EPA-Compliant 400 Cell High-Flow Catalysts: Increased exhaust efficiency while maintaining compliance standards.
- Faster Turbo Spool: Reduced restriction enhances responsiveness and mid-range torque.
- Increased Tuning Headroom: Supports higher boost levels compared to restrictive factory catalysts.
- Enhanced Exhaust Character: Deeper tone with stronger turbo acoustics and sharper crackles.
Performance & Engineering
- Optimized Flow Architecture: Minimizes backpressure while preserving catalyst efficiency.
- Mandrel-Bent Tubing: Smooth internal transitions for maximum exhaust velocity.
- Precision TIG Welding: Built to withstand high exhaust temperatures and elevated boost pressure.
- Direct OEM Bolt-On Installation: Utilizes factory mounting locations for straightforward installation.
- Engineered to Pair Seamlessly with Valvetronic Exhaust Systems
Sound Transformation
- Stock Exhaust + Downpipes: Noticeable increase in depth and turbo presence with improved exhaust clarity.
- Valvetronic Exhaust + Downpipes: Maximum transformation — enhanced crackles, sharper turbo spool acoustics, and a more aggressive overall signature.
Construction & Durability
- Premium high-grade stainless-steel construction
- High-temperature resistant 400 cell catalyst cores
- OEM-style sensor placement for proper operation
- Engineered for long-term reliability under high boost and tuned applications
Unlock the full performance potential of your B58N — starting at the source.
📩 Questions or ordering assistance? customerservice@valvetronic.com
- Brushed T304 Stainless Steel
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Warranty Coverage
All products manufactured by Valvetronic Designs are guaranteed to be free from manufacturing defects in materials and workmanship at the time of sale. A manufacturing defect is defined as any characteristic of the product that arises during the manufacturing process which impairs its usability for the purposes for which it was designed and manufactured.
Products are guaranteed to fit and function as designed on their intended vehicle application, provided the vehicle has not been modified or incurred structural damage. Sound or tone is not a warrantable or returnable issue, as exhaust sound is subjective and not considered a defect.
Warranty Periods
- 304 stainless steel and titanium exhaust tubes and welds carry a Lifetime of Ownership limited warranty against defects in workmanship or material, including penetrating rust.
- Mufflers and resonators carry a 3-year limited warranty against defects in workmanship or material, including penetrating rust.
- Catalysts are warranted to conform to EPA emission testing and OBDII compatibility criteria for 25,000 miles from the date of installation, whichever occurs first.
- Catalytic converter external shells, including end pipes, are warranted against corrosion and defective welding for 5 years or 50,000 miles from the date of installation, whichever occurs first.
- Vacuum pots, electronic remotes, and mechanical valves are covered by a 1-year limited warranty.
- Electronics, including 12V vacuum pumps, RF modules, and controllers, are covered by a 1-year limited warranty.
- Tip finish is covered by a 1-year limited warranty.
Warranty Terms
- Warranty coverage begins on the purchase date and applies only to the original purchaser.
- This warranty is not transferable or assignable at any time.
- Discoloration caused by heat, salt, brine, or other road treatments is not covered.
- Tip finish discoloration or damage caused by heat, chemicals, lack of maintenance, road salt, brine, other road treatments, road debris, or misuse is not covered.
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