Dinan Free Flow Axle-Back Exhaust with Black Tips for F87 BMW M2

The Dinan Free Flow Axle-Back Exhaust with Black Tips replaces the axle-back section on the F87 BMW M2 with a design built to flow more at full throttle without losing the daily-driver manners of the stock exhaust. Four black ceramic-coated quad tips replace the stock outlets, and the system reuses the factory exhaust valve actuators, so the computer-controlled valve still limits noise at low speed and opens the exhaust fully under load. At full valve-open, the piping steps up to 3.25 inches, and the whole system is 100% T304 stainless steel, dyno-tuned for more flow with less backpressure.

Features

Four 3.5-inch black ceramic-coated quad tips, laser-engraved with the Dinan logo
Reuses the factory exhaust valve actuators for computer-controlled operation
Tubing opens to 3.25 inches in diameter when the valve is open
Dyno-tuned for maximum flow with minimum backpressure
Reduces interior drone during normal driving
100% T304 stainless steel construction, brushed finish
Direct bolt-on installation using factory brackets and hangers; no cutting or welding

Specifications

Body and Pipe Material: T304 stainless steel, brushed finish
Pipe Diameter: 3.25 inches (when the valve is open)
Tip Configuration: Quad, 3.5-inch, black ceramic-coated, laser-engraved
System Weight: 45 lbs
Peak Gains: +6 HP at 6600 RPM, +5 lb-ft of torque at 6600 RPM
Installation Time: 1.2 hours, no cutting or welding

Applications

BMW M2: F87 | 2016-2018 | N55

Notes

Reuses the factory valve actuators, so no additional valve hardware or remote is needed for dual-mode operation
Rated by Dinan as legal for emissions-controlled street use, non-emissions-controlled use, and competition or racing use

Frequently Asked Questions

Will the Dinan Free Flow Axle-Back Exhaust fit my F87 M2? Yes. It’s built specifically for the 2016-2018 F87 BMW M2 with the N55 engine and bolts to the factory brackets and hangers with no cutting or welding.
How much power does this exhaust add? Dinan measured up to 6 horsepower and 5 lb-ft of torque at 6600 RPM on the dyno, with the piping opening to 3.25 inches when the valve is fully open for reduced backpressure.
Does the exhaust stay quiet with the valve closed? Yes. The system reuses the factory exhaust valve actuators, so it limits noise at low speed just like stock and only opens fully under load or throttle.
Is installation difficult? No. Dinan lists about 1.2 hours of labor, and the system bolts on using the factory brackets and hangers with no cutting or welding.
What are the Dinan Free Flow Axle-Back Exhaust tips made from? The tips are black ceramic-coated stainless steel, laser-engraved with the Dinan logo, and mounted as four quad outlets.
Is this exhaust street legal? Yes. Dinan rates it as legal for emissions-controlled street use, non-emissions-controlled use, and competition or racing use, since it does not affect vehicle emissions.

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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BP Pricing Difference

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