BMW G8X M2 / M3 / M4 400 Cell Catted Downpipes
BMW G8X M2 / M3 / M4 400 Cell Catted Downpipes is backordered and will ship as soon as it is back in stock.
Pickup available at LMTLS Auto
Usually ready in 24 hours
Delivery and Shipping
Delivery and Shipping
At LMTLS Auto, we prioritize getting your orders to you in a timely and safe manner. We also understand that accidents can happen during transit, which is why we’ve partnered with Navidium Protection to offer added peace of mind with every purchase.
Please allow up to 48 hours to process and ship your IN-STOCK ORDER. Orders for items that are not in-stock can take much longer. If you have a time sensitive shipment please email us to ensure there are no delays.
Free shipping promotions do not apply to orders shipping to:
Hawaii, Alaska, Puerto Rico and U.S. outlying territories (Guam, Virgin Islands, Etc.), International orders and limited other occasions.
We reserve the right to cancel any order in which the customer does not want to pay the shipping cost difference.
INTERNATIONAL SHIPMENTS
International orders are shipped via USPS FedEx or DHL.
All international shipments may be subject to customs fees, import duties and taxes. These fees are not integrated into the item pricing or shipping charges. These fees are paid by the buyer, upon arrival to its international destination. Any charges associated with the importation of products purchased from LMTLS Auto are the responsibility of the buyer. We do not pre-pay any customs fees, duties or taxes when the shipment arrives to the international destination. Any costs resulting from the refusal to import a product purchased through LMTLS Auto may result in additional charges.
BMW G8X M2 / M3 / M4 400 Cell Catted Downpipes
BMW G8X M2 / M3 / M4 – EPA-Compliant 400 Cell Catted Downpipes
Engineered for the S58 Twin-Turbo Inline-6 • High-Flow • Compliant •
Introducing Our NEW 400 Cell EPA-Compliant Downpipes for the G8X Platform
The BMW G8X M2, M3 and M4 represent the next evolution of M performance, powered by the highly capable S58 twin-turbo inline-6. While factory catalysts prioritize restriction and sound suppression, our NEW EPA-compliant 400 cell high-flow catted downpipes are engineered to reduce exhaust backpressure, enhance turbo efficiency, and unlock a sharper, more aggressive exhaust character — all while maintaining emissions compliance standards.
This upgrade maximizes the performance potential of the S58 platform without compromising drivability.
Why Upgrade to 400 Cell?
- EPA-Compliant 400 Cell High-Flow Catalysts: Increased exhaust flow while maintaining compliance standards.
- Improved Turbo Response: Reduced restriction enhances spool speed and mid-range power delivery.
- Enhanced Exhaust Character: Deeper tone with more defined turbo acoustics and sharper high-RPM presence.
- Street & Track Ready: Noticeable gains while maintaining everyday usability.
Performance & Engineering
- Optimized Flow Architecture: Minimizes backpressure while preserving catalyst efficiency.
- Mandrel-Bent Tubing: Smooth internal transitions for consistent exhaust velocity.
- Precision TIG Welding: Built to withstand extreme exhaust temperatures and high boost levels.
- 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 — stronger crackles, enhanced 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 tuning conditions
Unleash the full potential of your S58-powered G8X — starting at the source.
📩 Questions or ordering assistance? customerservice@valvetronic.com
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