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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
Catalytic Converter Direct Fit
Shop Catalytic Converters by Brand and Vehicle Application Browse premium direct fit catalytic converters at Black Ops Auto Works, including high-quality replacement and performance-focused options for a wide range of cars, trucks, SUVs, and performance vehicles. This collection is built for customers searching for direct fit catalytic converters, OEM-style catalytic converter replacements, high-flow catalytic converters, and vehicle-specific emissions components that support fitment, reliability, and exhaust performance. We carry catalytic converter products and related exhaust components from trusted brands found in our catalog, including MagnaFlow, Solo Performance, Stainless Works, aFe Power, and Fabspeed. Direct Fit Catalytic Converters for Easy Installation Direct fit catalytic converters are designed to match factory-style mounting points and simplify installation compared to universal-fit options. This collection is ideal for customers looking for: Direct fit catalytic conv...
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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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