BMW Downpipes for BMW F86 X6 M S63 4.4L

Clear BMW chassis

When BMW began to offer more and more forced induction vehicles, some enthusiasts were upset and others were excited about the big power potential. While we love older, naturally aspirated BMWs, we LOVE forced induction BMWs. Upgrading your downpipe (or downpipes) is one of the easiest ways to reduce restriction and add more power to your BMW. We offer several brands, including our own designs, of downpipes for your BMW!

Sort By:

Downpipe To Cat-Back Reducer - Priced Each

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:22427013

Part#: 006555ECS06B

In Stock

Sale - Save 40% $ 38.99

This product was last offered at the strikethrough price on
05-03-2026

$ 23.39 USD

Add to Wish List

Qty

Sale - Save 40%

$ 38.99

This product was last offered at the strikethrough price on
05-03-2026

$ 23.39 USD

Add to Wish List

Upgrade your exhaust system with the Downpipe To Cat-Back Reducer.

Engineered for optimal performance and durability, this reducer allows for seamless connection between your downpipe and cat-back exhaust system. Its high-quality construction ensures a tight seal, reducing exhaust leaks and enhancing overall exhaust flow. With easy installation and compatibility with various exhaust systems, this reducer is a must-have for any performance enthusiast.

Allows for seamless connection between downpipe and cat-back exhaust
High-quality construction for durability
Tight seal reduces exhaust leaks
Enhances overall exhaust flow
Easy installation and compatibility with various exhaust systems

Show More Show Less

Genuine BMW Exhaust Nut - Exhaust Manifold to Cylinder Head - F01 F02...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:36828

Part#: 11627576992

In Stock

3% off MSRP $ 6.42

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

$ 6.20 USD

Add to Wish List

Qty

3% off MSRP

$ 6.42

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

$ 6.20 USD

Add to Wish List

Genuine BMW Hex Nut Wiht Flange -
This item fits the following BMW Chassis:
E71,F01,F02,F06,F10,F12,F13,F15,F16

Fits BMW Engines including:
N63,N63N

Show More Show Less

F10,F06,F12,F13 550i/650i Supersprint High Flow Catted Down Pipes ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:395353

Part#: 989241KT

Ships in 3 Business Days

$ 6,890.99 USD

Add to Wish List

Qty

$ 6,890.99 USD

Add to Wish List

The stock down pipes cause a major restriction in the exhaust flow. BMW's solution to deal with the limited space in the engine compartment is to crush the turbo outlet tubes to reduce the size of the tubing. Doing this created undesirable backpressure. For emission purposes the factory also incorporated built-in pre-cats directly after the turbo outlet ports. This make the exhaust gas backpressure rise to extremely high levels at all rpm and engine loads. This design retains excessive heat in the engine and affects performance in a negative way. The design of the Supersprint down pipes takes advantage of even the smallest space available and frees the exhaust gas flow dramatically. The SS pipe cross section (no crushed pipe) remains constant all along the down pipes and the pre-cats are totally eliminated.

Supersprint exhaust is widely recognized as the leader in complete exhaust system upgrades - extremely high quality, well designed for optimal flow, and amazing sound. Even at a premium price Supersprint is an unbeatable exhaust system because every aspect is done to such a high level. A Supersprint exhaust rewards you with a terrific sound, long lasting construction and excellent fitment. The Supersprint sound is very 'European' which fits the sporting sophistication of BMWs perfectly. Most systems are also modular - sections can be added or removed to custom tailor the exhaust sound to your preferance. Aside from 'Race' systems, their mufflers meet European noise laws so you get a refined and tuned sound without being excessively loud. Most Supersprint systems are built with larger diameter piping to improve exhaust flow which helps the engine do less work and make more horsepower! Supersprint exhausts generally run at a premium over other systems but no other system on the market can match their quality, performance, or reputation!

Show More Show Less

Active Autowerke GESI Catted Downpipes - S63 N63

For 2014+ model years only

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:397488

Part#: 11-041

Ships in 3 Business Days

5% off MSRP $ 2,999.00

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

$ 2,849.99 USD

Add to Wish List

Qty

5% off MSRP

$ 2,999.00

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

$ 2,849.99 USD

Add to Wish List

Active Autowerke is proud to bring you our hand made Signature S63/N63 Downpipes for the twin-turbo V8 BMW X5M, X6M, 550i, 650i, X5, X6 models. This variant includes a pair of 4.5" ultra high flow GESI catalytic converter that will NOT produce a CEL!

Show More Show Less

Active Autowerke S63 N63 A-Flow Catted Downpipes

For 2014+ model years only

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For 2014+ model years only

T#:51075079

Part#: 11-041A

Ships in 3 Business Days

$ 2,279.00 USD

Add to Wish List

Qty

$ 2,279.00 USD

Add to Wish List

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)

Project Cars

SELECT YOUR BMW

BMW Downpipes for BMW F86 X6 M S63 4.4L

Downpipe To Cat-Back Reducer - Priced Each

Upgrade your exhaust system with the Downpipe To Cat-Back Reducer.

Genuine BMW Exhaust Nut - Exhaust Manifold to Cylinder Head - F01 F02...

F10,F06,F12,F13 550i/650i Supersprint High Flow Catted Down Pipes ...

Active Autowerke GESI Catted Downpipes - S63 N63

Active Autowerke S63 N63 A-Flow Catted Downpipes

Select Vehicle

Purpose

Category

Brand

Price

Special Offers

Shipping

Narrow Results