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ARP Cylinder Head Stud Kit - Custom Age 625+ - BMW S63 4.4L
ARP Cylinder Head Stud Kit - Custom Age 625+ - BMW S63 4.4L
ARP - Corporate Logo
T#:51110152
Part#: 201-4703
Ships in 7 Business Days
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$ 1,099.99 USD
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$ 1,099.99 USD
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For engine builders pushing the absolute limits of high-performance engineering, the ARP Custom Age 625+ Cylinder Head Stud Kit represents the pinnacle of fastening technology. While standard aircraft-quality steels and even the renowned ARP2000 alloy are impressive, the proprietary Custom Age 625+ super-alloy provides a massive leap in capability by increasing tensile strength by an additional 40,000 to 60,000 psi. This specialized hardware is engineered specifically for ultra-high-boost applications, offering superior fatigue resistance and the unique ability to maintain its structural integrity under extreme temperatures that would cause lesser materials to weaken.
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Active Autowerke S63 N63 A-Flow Catted Downpipes
Active Autowerke S63 N63 A-Flow Catted Downpipes
Active Autowerke - Corporate Logo
T#:51110136
Part#: 11-041AB
Ships in 3 Business Days
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$ 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
BFI GS1 Billet / Air Leather Shift Knob - Black / Gold - BMW Fitment ...
Black Forest Industries - Corporate Logo
T#:50934273
Part#: GS1-70101-4
Ships on Oct 12, 2026
New Item
$ 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
Black Forest Industries Extended Wheel Bolt - M14x1.25 - 40mm ...
Black Forest Industries - Corporate Logo
T#:50899207
Part#: BFI-905-LUG
Ships on Oct 12, 2026
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$ 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
Extended Wheel Bolt - M12x1.5 - 35mm
Black Forest Industries - Corporate Logo
T#:50899204
Part#: BFI-906-LUG
Ships on Oct 12, 2026
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$ 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
Active Autowerke S63 N63 A-Flow Catted Downpipes
For 2014+ model years only
For 2014+ model years only
Active Autowerke - Corporate Logo
T#:51075079
Part#: 11-041A
Ships in 3 Business Days
New Item
$ 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
GS2 Air Leather Shift Knob - Black / Gold Leaf - BMW Fitment ...
Black Forest Industries - Corporate Logo
T#:50934279
Part#: GS2-70101-4
Ships on Oct 12, 2026
New Item
$ 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 Leaf - BMW Fitment
Black Forest Industries GS1 Alcantara Shift Knob - Black / Silver Lea...
Black Forest Industries - Corporate Logo
T#:50934274
Part#: GS1-BMW-ALC
Ships on Oct 12, 2026
New Item
$ 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
GS2 Air Leather Shift Knob - Blue / Silver Leaf - BMW Fitment ...
Black Forest Industries - Corporate Logo
T#:50934282
Part#: GS2-70103-1
Ships on Oct 12, 2026
New Item
$ 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.
BFI GS1 Billet / Air Leather Shift Knob - Black / Silver - BMW Fitment
BFI GS1 Billet / Air Leather Shift Knob - Black / Silver - BMW Fitmen...
Black Forest Industries - Corporate Logo
T#:50934271
Part#: GS1-70101-2
Ships on Oct 12, 2026
New Item
$ 164.99 USD
Free Shipping on orders $49 and up
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$ 164.99 USD
Free Shipping on orders $49 and up
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The BFI GS1 is the perfect upgrade for the BMW enthusiast who demands better tactile feedback.
Black Forest Industries GS2 Air Leather Shift Knob - Black / Red Leaf - BMW Fitment
Black Forest Industries GS2 Air Leather Shift Knob - Black / Red Leaf...
Black Forest Industries - Corporate Logo
T#:50934280
Part#: GS2-70101-5
Ships on Oct 12, 2026
New Item
$ 184.99 USD
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$ 184.99 USD
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The GS2 utilizes a solid billet aluminum core to provide a dense, mechanical connection to your transmission.
BFI GS2 Air Leather Shift Knob - Black / Silver Leaf - BMW Fitment
BFI GS2 Air Leather Shift Knob - Black / Silver Leaf - BMW Fitment ...
Black Forest Industries - Corporate Logo
T#:50934276
Part#: GS2-70101-2
Ships on Oct 12, 2026
New Item
$ 184.99 USD
Free Shipping on orders $49 and up
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$ 184.99 USD
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The Black Forest Industries GS2 is the ideal choice for the BMW owner who demands both style and substance.
Black Forest Industries GS2 Air Leather Shift Knob - Red / Silver Leaf - BMW Fitment
Black Forest Industries GS2 Air Leather Shift Knob - Red / Silver Lea...
Black Forest Industries - Corporate Logo
T#:50934281
Part#: GS2-70102-1
Ships on Oct 12, 2026
New Item
$ 184.99 USD
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$ 184.99 USD
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Precision meets bold design.
ARP2000 12PT HSK - S63
ARP2000 12PT HSK - S63
ARP - Corporate Logo
T#:54104152
Part#: 201-4702
Ships on Oct 6, 2026
New Item
20% off MSRP $ 639.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 511.99 USD
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20% off MSRP
$ 639.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 511.99 USD
Add to Wish List
Developed specifically for high-boost, high-horsepower motorsport applications, the ARP Head Stud Kit provides the ultimate clamping force required to maintain a perfect head-to-block seal under the most grueling race conditions.
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