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SKU: BMW.B58N.SC
Fabspeed BMW B58N Sport Catalytic Converter Downpipe (2023+)
Upgrade your BMW with the Fabspeed B58N Sport Catalytic Converter Downpipe featuring German HJS 200 cell EURO 6 compliant trimetallic cats. This direct bolt-on replacement for OEM 18325A04CB2 fits all 2023+ B58N models including X5 X6 X7 40i worldwide. Gain more exhaust flow power and sportier sound across the RPM range without triggering a check engine light.
Key Features
- HJS German Cats: 200 cell EURO 6 homologated trimetallic converters support 1200HP+ with 90-93% straight pipe flow and full emissions scrubbing
- Pipe Sizing: 4 inch from engine to cat 3 inch from cat to exhaust for unrestricted CFM and better gas filtering than OEM 700 cell ceramic cores
- Performance Gains: Increased horsepower torque and sound over factory with no CEL even on tuned setups
- Build Quality: CNC mandrel-bent T304L stainless steel using German USA components hand-built in-house
- Warranty Backed: Covered by Fabspeed Lifetime Warranty for long-term durability
Product Notes
- Direct OEM replacement requires no cutting or welding
- Pair with ECU tune for even greater power unlocks
- Ships in protective packaging to prevent damage
Installation Notes
- Professional installation recommended.
- Bolt-on design uses factory mounting points and hardware
- Typically installs in 1-2 hours with basic tools
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2023-2024 | BMW | X5 | sDrive40i |
| 2023-2024 | BMW | X5 | xDrive40i |
| 2023-2024 | BMW | X5 | xDrive50e |
| 2023-2024 | BMW | X6 | xDrive40i |
| 2023-2024 | BMW | X7 | xDrive40i |
Why Choose Fabspeed?
- Exclusive North South America importer of genuine HJS Germany catalytic converters for 20+ years
- Street Autobahn race-proven components deliver more power than OEM or cat-delete pipes
- Hand-built precision engineering ensures OBD2 compliance and zero CEL risk
Frequently Asked Questions
-
Q: Does this fit all 2023+ BMW B58N models?
A: Yes fits worldwide B58N-equipped vehicles including X5 G05 X6 G06 X7 G07 40i series as direct OEM replacement -
Q: What material is used?
A: T304L stainless steel piping with German HJS EMITEC trimetallic catalytic cores for durability and flow -
Q: What warranty applies?
A: All Fabspeed products including this downpipe carry the Lifetime Warranty against defects
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Secure custom box 48x12x12 inches
- Weight: 18 lbs
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Fabspeed
Fabspeed Motorsport is a Pennsylvania-based performance parts manufacturer that specializes in exhaust systems, sport catalytic converters, headers, downpipes, intake systems, and carbon fiber components engineered specifically for exotic and high-performance European sports cars including Porsche, Ferrari, Lamborghini, McLaren, BMW M, and Audi R8. Every Fabspeed product is TIG-welded from aerospace-grade stainless steel or titanium in the USA, dyno-tested for measurable power and sound improvement, and designed as a direct bolt-on replacement that preserves the factory catalytic converter monitoring system or provides an explicit sport cat solution for emissions-compliant upgrades. Exotic car owners who have already maximized software and cosmetic modifications choose Fabspeed exhaust systems because the brand's specialty focus on a narrow range of platforms produces fit quality and sound character that universal exhaust manufacturers cannot achieve. The brand's XperTune ECU calibr...
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