BMW X5 M S63 4.4L

Active Autowerke S63 N63 A-Flow Catted Downpipes

T#:51110136

Part#: 11-041AB

Ships in 3 Business Days

$ 2,279.00 USD

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$ 2,279.00 USD

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Active Autowerke’s Aflow Catted Downpipes provide a "no-compromise" solution for the G-body enthusiast who wants high-flow performance without the drawbacks of a track-only "catless" setup. These downpipes feature advanced metallic high-flow catalysts that satisfy onboard diagnostic requirements, meaning you can enjoy increased power without the headache of a Check Engine Light (CEL). By utilizing premium 304 stainless steel and a low-restriction design, these pipes are built to withstand the intense thermal cycles of a twin-turbo V8 while delivering a deep, aggressive exhaust note. This variant is a true bolt-on upgrade that preserves the daily driveability and luxury experience of your BMW while significantly improving its performance ceiling. Key Features: No CEL Operation: Engineered to work with factory emissions monitors for a dashboard-clear experience. Streamlined Exhaust Path: Mandrel-bent 3" piping with minimal bends for smooth, high-velocity exhaust gas flow. Precision Fitment: Developed through extensive R&D to provide a factory-like bolt-on installation. Hand-Made in the USA: Fabricated in-house at Active Autowerke’s Miami facility to ensure surgical quality control. Vibration Resistance: Robust TIG welding and heavy-duty brackets ensure longevity even under aggressive driving conditions. Specifications: Primary Material: Brushed 304 Stainless Steel. Inlet/Outlet: Precision cast V-band inlet and direct-fit outlet. Flow Rating: Significantly higher CFM than restrictive factory ceramic converters. Installation: 100% Bolt-on; no cutting or welding required. Finish: Natural Stainless. Lead Time: Typically custom made-to-order (Approx. 2-week build time).

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BFI GS1 Billet / Air Leather Shift Knob - Black / Gold - BMW Fitment ...

T#:50934273

Part#: GS1-70101-4

Ships on Oct 12, 2026

$ 164.99 USD

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$ 164.99 USD

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The Black Forest Industries GS1 shift knob is engineered specifically for the BMW driver who wants a more mechanical connection to their transmission.

Black Forest Industries Extended Wheel Bolt - M14x1.25 - 40mm ...

T#:50899207

Part#: BFI-905-LUG

Ships on Oct 12, 2026

$ 4.99 USD

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$ 4.99 USD

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Specifically designed for use with 10mm to 15mm wheel spacers to maintain proper thread reach.

Extended Wheel Bolt - M12x1.5 - 35mm

T#:50899204

Part#: BFI-906-LUG

Ships on Oct 12, 2026

$ 4.99 USD

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$ 4.99 USD

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Specifically engineered for vehicles utilizing a wheel stud conversion.

Active Autowerke S63 N63 A-Flow Catted Downpipes

For 2014+ model years only

T#:51075079

Part#: 11-041A

Ships in 3 Business Days

$ 2,279.00 USD

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$ 2,279.00 USD

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For the BMW owner seeking increased performance without the drawbacks of a "catless" system, the Active Autowerke Aflow Catted Downpipes offer the perfect solution. These downpipes feature high-flow metallic catalytic converters that are specifically designed to maintain exhaust efficiency while preventing the dreaded Check Engine Light (CEL). Unlike track-only pipes that can produce raw fuel odors and cabin drone, the Aflow series maintains a sophisticated, refined exhaust note suitable for a luxury daily driver. Each set is custom-made in-house to ensure an exact bolt-on fit, providing a reliable solution that satisfies both the driver’s demand for power and the vehicle’s onboard diagnostic requirements. Key Features: No CEL Guarantee: Advanced Aflow catalyst technology prevents catalytic efficiency dashboard warnings. Refined Exhaust Note: Provides an aggressive V8 growl while maintaining cabin comfort for daily use. Bolt-On Installation: No cutting or welding required; replaces the bulky factory units directly. Thermal Resilience: Built to withstand the high temperatures generated by the S63 and N63 twin-turbo engines. Safe for Occupants: Reduces harmful emissions and raw exhaust odors compared to catless alternatives. Specifications: Primary Material: Brushed 304 Stainless Steel Fitting: Direct OEM Replacement (Bolt-on) Manufacturing Location: Hand-made in Miami, FL Weight Reduction: Lighter than the heavy, ceramic-core factory catalytic converters Surface Finish: Natural Stainless Lead Time: Custom made-to-order (Approx. 2 weeks)

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GS2 Air Leather Shift Knob - Black / Gold Leaf - BMW Fitment ...

T#:50934279

Part#: GS2-70101-4

Ships on Oct 12, 2026

$ 184.99 USD

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$ 184.99 USD

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Precision meets prestige with the Black Forest Industries GS2 Knob.

Black Forest Industries GS1 Alcantara Shift Knob - Black / Silver Lea...

T#:50934274

Part#: GS1-BMW-ALC

Ships on Oct 12, 2026

$ 174.99 USD

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$ 174.99 USD

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Elevate your M-Performance interior with the Black Forest Industries GS1 Alcantara Edition.

GS2 Air Leather Shift Knob - Blue / Silver Leaf - BMW Fitment ...

T#:50934282

Part#: GS2-70103-1

Ships on Oct 12, 2026

$ 184.99 USD

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$ 184.99 USD

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This Blue and Silver combination looks incredible in cars with the "M" tri-color stitching on the steering wheel, highlighting the blue thread perfectly.