What does the Dinan M550i middle exhaust fit?

The Dinan M550i middle exhaust fits the G30 BMW M550i xDrive from 2018 through 2023 with the N63 4.4L twin-turbo V8. It is a direct bolt-on to the factory mounting points for the section it replaces. It is designed for the G30 sedan; confirm your chassis if you have the G31 Touring wagon before ordering.

How does the Dinan M550i middle exhaust help?

The mid-section replaces the hydro-formed factory center section and resonator with a mandrel-bent 3 in (76mm) X-pipe, replacing the stock 70mm tubing to cut restriction and let more sound through. The X-pipe evens exhaust flow between both banks, and on the twin-turbo N63 this reduces backpressure for a small power gain while delivering a smoother, sportier V8 tone.

What is the Dinan M550i middle exhaust made of?

The Dinan M550i middle exhaust is made from 100% T304 stainless steel and is TIG-welded, so it resists corrosion and holds up to exhaust heat. The X-pipe crossover is mandrel-bent for minimum restriction, keeping the tubing's full 3 in diameter through each curve for smoother flow than the stock hydro-formed piping.

Do I need other parts with the Dinan M550i middle exhaust?

The Dinan M550i middle exhaust replaces the mid-section of the exhaust and pairs with a Dinan axle-back or the factory rear section. Confirm your existing exhaust setup so the connections match before installing; the section is designed to integrate with the factory rear or a compatible aftermarket rear.

Is the Dinan M550i middle exhaust difficult to install?

No. The Dinan M550i middle exhaust is a bolt-on installation using the factory mounting points, with no cutting or welding required. Mounting hardware is included to complete the swap, though professional installation is recommended for the best fit and alignment.

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Description

Dinan High Flow Middle Exhaust 3in for G30 BMW M550i xDrive

Dinan M550i middle exhaust is a T304 stainless steel high-flow mid-section for the G30 BMW M550i xDrive and its N63 4.4L twin-turbo V8. It replaces the restrictive hydro-formed factory center section and resonator with a mandrel-bent 3″ X-pipe for even flow to both banks, improving exhaust flow and freeing up the V8 sound, TIG-welded from 100% 304 stainless for a clean, durable finish. It bolts on directly using the factory mounting points with included hardware.

Features

Mandrel-bent X-pipe crossover for minimum restriction
Deletes the resonator between the catalyst and rear muffler for increased volume
3″ (76mm) tubing replaces the stock 70mm tubing for freer flow
100% T304 stainless steel construction
TIG-welded for a clean, durable finish
Mounting hardware included
Smoother, sportier sound
Bolt-on installation

Applications

BMW M550i xDrive: G30 | 2018-2023 | 4.4L Twin-Turbo V8 N63

Notes

Deletes the factory resonator for increased volume. Direct bolt-on to factory mounting points; hardware included.

Frequently Asked Questions

What does the Dinan M550i middle exhaust fit? The Dinan M550i middle exhaust fits the G30 BMW M550i xDrive from 2018 through 2023 with the N63 4.4L twin-turbo V8. It is a direct bolt-on to the factory mounting points for the section it replaces. It is designed for the G30 sedan; confirm your chassis if you have the G31 Touring wagon before ordering.
How does the Dinan M550i middle exhaust help? The mid-section replaces the hydro-formed factory center section and resonator with a mandrel-bent 3″ (76mm) X-pipe, replacing the stock 70mm tubing to cut restriction and let more sound through. The X-pipe evens exhaust flow between both banks, and on the twin-turbo N63 this reduces backpressure for a small power gain while delivering a smoother, sportier V8 tone.
What is the Dinan M550i middle exhaust made of? The Dinan M550i middle exhaust is made from 100% T304 stainless steel and is TIG-welded, so it resists corrosion and holds up to exhaust heat. The X-pipe crossover is mandrel-bent for minimum restriction, keeping the tubing’s full 3″ diameter through each curve for smoother flow than the stock hydro-formed piping.
Do I need other parts with the Dinan M550i middle exhaust? The Dinan M550i middle exhaust replaces the mid-section of the exhaust and pairs with a Dinan axle-back or the factory rear section. Confirm your existing exhaust setup so the connections match before installing; the section is designed to integrate with the factory rear or a compatible aftermarket rear.
Is the Dinan M550i middle exhaust difficult to install? No. The Dinan M550i middle exhaust is a bolt-on installation using the factory mounting points, with no cutting or welding required. Mounting hardware is included to complete the swap, though professional installation is recommended for the best fit and alignment.

About Dinan

Founded in 1979, Dinan is North America’s leading BMW tuner, developing, manufacturing, and marketing a full line of high-performance products for BMW, MINI, and Mercedes-Benz. Dinan works through a nationwide network of Authorized Dinan Performance Centers, including select BMW dealerships and independent BMW service and performance shops. The company’s warranty program, introduced in 1996 with BMW of North America’s cooperation, matches BMW’s new car warranty and covers Dinan enhancements and the vehicle itself for up to 4 years or 50,000 miles. That coverage lets BMW owners add real performance without risking their factory warranty. Automotive publications have tested Dinan-enhanced BMWs against some of the world’s most exotic sports cars for three decades, and the results consistently hold up. Despite that performance, Dinan BMWs keep the reliability and everyday civility BMW owners expect. The product line spans engine, driveline, and chassis components across the full BMW lineup, covering acceleration, cornering, and stopping power. Every Authorized Dinan Performance Center can help build anything from a single upgrade to a complete Dinan BMW.

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Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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