Product Details
Fitment
FAQ
Shipping & Returns
Built specifically for BMW models equipped with the N63B44 4.4L twin-turbo V8, this Flashark catless downpipe set replaces both restrictive factory downpipes to create a freer-flowing exhaust path after the turbochargers.
Each set includes two stainless-steel downpipes, designed for N63B44-powered 550i, 650i, 750i, X5, X6, and Alpina B7 applications listed in the Fitment table. The system is made for enthusiasts seeking a more aggressive exhaust character and reduced exhaust restriction in a compatible performance build.
Features
- Complete dual-downpipe set: Includes 2 catless downpipes for the N63 twin-turbo exhaust layout.
- N63B44-specific fitment: Designed only for the confirmed 4.4L twin-turbo N63B44 applications below.
- 16-gauge T-304 stainless steel: Built for heat resistance, corrosion resistance, and long-term durability.
- Mandrel-bent piping: Supports a smoother exhaust path with no unnecessary restriction.
- Precision flanges and TIG-welded joints: CNC-machined connection points help support accurate installation and durable sealing.
- Pipe dimensions: 3-inch inlet diameter and 2.5-inch outlet diameter.
- Installation hardware: Gaskets and bolts are included as shown in the product images.
Shipping, Returns & Warranty
- Free Shipping: Available on this product.
- Estimated Delivery: 3–5 business days under normal shipping conditions.
- Warranty: 1-year limited warranty.
- Returns: Covered by Flashark’s applicable money-back and return policy. Please inspect fitment before installation, as installed or modified exhaust parts may not qualify for return.
Important: This is a catless downpipe set with no catalytic converters. It may increase exhaust volume, trigger a check-engine light, and may not be legal for public-road use where emissions equipment is required. Professional installation and appropriate ECU calibration are recommended.
Stock Downpipe vs BMW N63 Aftermarket Downpipe
Upgrading your BMW N63 engine with an aftermarket downpipe can significantly enhance performance. While stock downpipes meet emissions standards, aftermarket N63 downpipes are designed for better exhaust flow, providing more power and a more exciting driving experience.
- More Power: Aftermarket downpipes reduce exhaust restrictions, increasing horsepower and torque for better performance.
- Faster Throttle Response: Reduced turbo lag means quicker acceleration and a more responsive feel.
- Aggressive Sound: A catless N63 downpipe offers a louder, sportier exhaust note compared to stock systems.
- Better Efficiency: Improved exhaust flow can slightly boost fuel efficiency during high-performance driving.
Why Choose Flashark's BMW N63 Downpipe?
Flashark's BMW N63 Downpipe offers unmatched performance, durability, and value. Crafted from premium stainless steel, it’s built to withstand the high temperatures and stresses of performance driving. Designed specifically for BMW N63 engines, it ensures perfect fitment and hassle-free installation. Whether you’re looking to increase power, improve engine efficiency, or enhance your driving experience, Flashark delivers the best solution for your performance upgrade. Choose Flashark for a product that delivers both in performance and reliability.
Engine Overview: 2008-2014 BMW N63
The BMW N63 is a 4.4L V8 twin-turbocharged engine introduced in 2008, known for its power and efficiency. It powers several BMW models, including the BMW 550i, 650i, 750i, X5, and X6, as well as the Alpina B7. The N63 engine features advanced turbocharging technology, providing a perfect balance of performance and fuel efficiency. With its impressive power output, it’s a favorite among enthusiasts seeking both luxury and speed. Whether you're driving a 2009-2012 BMW 750i, or a 2010-2013 X5, the N63 engine remains a cornerstone of BMW’s high-performance lineup.
Confirmed compatible — BMW N63B44 4.4L V8 Twin Turbo only:
| Year | Make | Model | Engine |
|---|---|---|---|
| 2011–2013 | BMW | 550i | N63B44 4.4L V8 Twin Turbo |
| 2010–2013 | BMW | 550i Gran Turismo xDrive | N63B44 4.4L V8 Twin Turbo |
| 2012 | BMW | 650i / 650i xDrive | N63B44 4.4L V8 Twin Turbo |
| 2009–2012 | BMW | 750i / 750i xDrive | N63B44 4.4L V8 Twin Turbo |
| 2009–2012 | BMW | 750Li / 750Li xDrive | N63B44 4.4L V8 Twin Turbo |
| 2011–2012 | BMW | Alpina B7 / B7 xDrive / B7L / B7L xDrive | N63B44 4.4L V8 Twin Turbo |
| 2010–2013 | BMW | X5 | N63B44 4.4L V8 Twin Turbo |
| 2008–2014 | BMW | X6 | N63B44 4.4L V8 Twin Turbo |
Not compatible with: N63TU, N63TU2, S63, N55, B58, or any BMW outside the table above. A 4.4L V8 model name alone does not confirm fitment—please verify the N63B44 engine before ordering.
Q: Does this fit every BMW X5, X6, 550i, 650i, or 750i?
A: No. This set fits only the confirmed model years equipped with the N63B44 4.4L twin-turbo V8. BMW used several different turbocharged V8 engines, so please verify your engine before ordering.
Q: Is this a complete set for the N63 twin-turbo engine?
A: Yes. The package includes 2 catless downpipes, one for each turbocharger bank, plus the gaskets and bolts shown in the product images.
Q: Why are the inlet and outlet sizes different?
A: This downpipe set uses a 3-inch inlet and a 2.5-inch outlet to match its designed turbo-side and downstream exhaust connections. Please compare these measurements with your existing exhaust configuration before ordering.
Q: Is this a catted downpipe?
A: No. This is a catless downpipe set with no catalytic converters. It is designed for reduced exhaust restriction and a more aggressive exhaust sound.
Q: Will this cause a check-engine light?
A: It may. Removing the factory catalytic converters can trigger emissions-related fault codes or a check-engine light. Appropriate ECU calibration is recommended for a catless setup.
Q: Can I install these downpipes myself?
A: N63 downpipe installation involves tight engine-bay access, high-temperature exhaust hardware, and correct sealing of both turbo connections. Professional installation is recommended.
Q: Is this downpipe set legal for street use?
A: Because this product removes the catalytic converters, it may not be legal for public-road use where emissions equipment is required. Please check local regulations before purchase and installation.
Q: What warranty and shipping coverage does this product have?
A: This product includes free shipping, estimated 3–5 business day delivery under normal conditions, and a 1-year limited warranty. Please review Flashark’s current return policy before installing the product.
Fast Shipping Policy
Your order will be dispatched within 1-2 business days, and the package will arrive within your order's estimated date. Click for Shipping Policy
Easy Return Policy
Every order comes with a 30-day free return, provided the item is brand new, uninstalled, and in its original packaging. We cover return shipping for quality issues. Refunds are processed within 3-5 business days. Click for Return Policy
Worry-Free Delivery Protection
Add Worry-Free Delivery at checkout — if it's lost, stolen, or damaged, you're 100% covered. Click for Worry-Free Delivery Protection