Does the Dinan G42 M240i exhaust fit both the M240i and M240i xDrive?

Yes. It's built for the G42 BMW M240i and M240i xDrive from the 2023 through 2026 model years. Dinan includes factory-style mounting hardware and clamps for a direct installation with no fabrication required on either drivetrain.

How does the dual-valve design on the Dinan G42 M240i exhaust work?

The system adds a second electronic valve alongside the factory actuator. With both valves closed, exhaust gases route through the muffler for a quiet, civil cruise; opening them lets gas flow freely through the entire system for a deeper, more aggressive tone on demand.

How difficult is the Dinan G42 M240i exhaust to install?

Dinan rates the job at about 2.5 labor hours using factory-style mounting hardware and clamps, with no cutting, welding, or fabrication required.

What is the Dinan G42 M240i exhaust made from?

It's built from 100% T304 stainless steel with TIG-welded construction and a brushed finish, paired with dual 76mm electronic valves that are 30% less restrictive than the factory units and four double-walled, straight-cut 102mm tips in black ceramic coating.

How much horsepower does the Dinan G42 M240i exhaust add?

Dinan measured a peak gain of 6 hp and 5 ft-lb of torque at 6,600 rpm on the dyno, with larger 76mm piping and dual valves that flow more freely than the factory system while running about 4 lbs lighter overall.

Is the Dinan G42 M240i exhaust street legal?

Yes. It carries an Emissions Code 5 rating, meaning it's legal for street use in all 50 states, since the factory catalytic converters and emissions equipment stay in place; only the sound and flow downstream of them change.

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Description

Dinan Valved Axle-Back Exhaust with Black Tips for G42 BMW M240i and M240i xDrive

Dinan G42 M240i exhaust adds a second electronic valve alongside the factory actuator, giving the system full control over sound instead of leaving it to the one stock valve alone. Larger 76mm piping and dual 76mm valves, 30% less restrictive than the factory units, feed four double-walled, straight-cut 102mm tips finished in black ceramic coating, so the exhaust can stay closed and civil in town or open up for a deeper, straight-pipe-style tone on demand. Dinan builds the system in 100% T304 stainless steel and backs the upgrade with the same warranty philosophy it has used since partnering with BMW of North America in 1996.

Design and Performance

With both valves closed, exhaust gases are forced through the muffler for a quiet, civil cruise; open them and gas flows freely through the entire system for a deeper, meatier tone with real drone abatement built in for the highway. Dinan pairs that valve control with a genuine dyno gain and a lighter system than stock, so the M240i and M240i xDrive pick up sound and response without adding weight.

Features

100% T304 stainless steel construction, TIG-welded, brushed finish
Dual 76mm electronic exhaust valves, 30% less restrictive than the factory valve
Four double-walled, straight-cut 102mm tips, 4-inch clamp-on, finished in black ceramic coating with a laser-engraved Dinan logo
Larger 76mm mid-pipe (up from the stock 70mm)
Level-1 install difficulty
Emissions Code 5 rated; street legal in all 50 states

Applications

BMW M240i: G42 | 2023-2026 | 3.0L Turbo I6 B58
BMW M240i xDrive: G42 | 2023-2026 | 3.0L Turbo I6 B58

Notes

A polished-tip version is available as Dinan part number D660-0098
Adds a dedicated second exhaust valve alongside the factory actuator for independent sound control
Uses factory-style mounting hardware for a direct, no-fabrication install

Frequently Asked Questions

Does the Dinan G42 M240i exhaust fit both the M240i and M240i xDrive? Yes. It’s built for the G42 BMW M240i and M240i xDrive from the 2023 through 2026 model years. Dinan includes factory-style mounting hardware and clamps for a direct installation with no fabrication required on either drivetrain.
How does the dual-valve design on the Dinan G42 M240i exhaust work? The system adds a second electronic valve alongside the factory actuator. With both valves closed, exhaust gases route through the muffler for a quiet, civil cruise; opening them lets gas flow freely through the entire system for a deeper, more aggressive tone on demand.
How difficult is the Dinan G42 M240i exhaust to install? Dinan rates the job at about 2.5 labor hours using factory-style mounting hardware and clamps, with no cutting, welding, or fabrication required.
What is the Dinan G42 M240i exhaust made from? It’s built from 100% T304 stainless steel with TIG-welded construction and a brushed finish, paired with dual 76mm electronic valves that are 30% less restrictive than the factory units and four double-walled, straight-cut 102mm tips in black ceramic coating.
How much horsepower does the Dinan G42 M240i exhaust add? Dinan measured a peak gain of 6 hp and 5 ft-lb of torque at 6,600 rpm on the dyno, with larger 76mm piping and dual valves that flow more freely than the factory system while running about 4 lbs lighter overall.
Is the Dinan G42 M240i exhaust street legal? Yes. It carries an Emissions Code 5 rating, meaning it’s legal for street use in all 50 states, since the factory catalytic converters and emissions equipment stay in place; only the sound and flow downstream of them change.

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.

Additional Information

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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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