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BMW GEN3 B58N 400 Cell Catted Downpipes
BMW GEN3 B58N 400 Cell Catted Downpipes
BMW GEN3 B58N 400 Cell Catted Downpipes
BMW GEN3 B58N 400 Cell Catted Downpipes
BMW GEN3 B58N 400 Cell Catted Downpipes
BMW GEN3 B58N 400 Cell Catted Downpipes
BMW GEN3 B58N 400 Cell Catted Downpipes
BMW GEN3 B58N 400 Cell Catted Downpipes
BMW GEN3 B58N 400 Cell Catted Downpipes
BMW GEN3 B58N 400 Cell Catted Downpipes
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ALL DISCOUNTS APPLIED IN CART!

BMW GEN3 B58N 400 Cell Catted Downpipes

Price
$1,999.99

📞 Price too high or questions before ordering? Call/text us at 475-227-5381

BMW GEN3 B58– EPA-Compliant 400 Cell Catted Downpipes

Engineered for the Gen 3 B58 Turbocharged Inline-6 • High-Flow • Compliant •

Introducing Our NEW 400 Cell EPA-Compliant Downpipes for the GEN3 B58 Platform

The Gen 3 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

BMW GEN3 B58N 400 Cell Catted Downpipes

BMW GEN3 B58N 400 Cell Catted Downpipes

$1,999.99

Questions?

WE HAVE ANSWERS

How long til' I get my order?

Small items arrive to you in under 1 week

Larger products like full suspension kits must ship freight and can take 1-3 Weeks

Are Installation Instructions Included?

Instructions are included for most parts that require any sort of knowledge to install.

Here's what to do if your parts come WITHOUT instructions:

1. Some parts are genuinely common sense on how they get installed

2. If you can't figure it out on your own, YOUTUBE IS YOUR FRIEND! Our founder started this company from learning how to build headlights off a YouTube Video

3. If there are no videos on YouTube, or instructions anywhere on Google then please CALL OR EMAIL US and we will guide you through or get you instructions from the manufacturer

4. Doing installs on your own is always fun, but sometimes, it isn't. Always consider having your parts professionally installed

ALWAYS CONSIDER US. We sold you the parts, let us install them at THE LAB in Connecticut. We offer enclosed and open cross country transportation.

Of course you won't want to spend thousands on transportation to install lug nuts or emblems but if you are spending a LOT of money on parts, you may just want to send the car our way

What is your return policy if the part doesn’t fit or isn’t what I expected?

If the part was NOT installed, we accept returns within 14 days of delivery.

If the part WAS installed (or attempted installation), we cannot accept a return.

Do your parts come with a warranty?

All parts come with Manufacturer Warranty! Each manufacturer has different warranties so we suggest reading up on their warranty policy before ordering.

I found a better price somewhere else, can you beat it?

YES! If you come across a competitor with a lower advertised price than us, we will BEAT it by at LEAST 1%. Please contact us with proof of the lower priced product.

Do you give out discounts or sponsorships?

NO! We do not give out discounts or do sponsorships. You can get 5% OFF your first order by signing up for text & email notifications. OR just wait until our BLACK FRIDAY Sale that happens once a year.

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REAL CUSTOMERS, REAL BUILDS

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