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Fitment notes and restrictions
Description
Add a deeper M240i exhaust note while retaining factory mounting points
Dinan D660-0067-BLK is a rear-section exhaust for supported F22 coupe and F23 convertible M240i models. The 16-gauge 304 stainless assembly uses a Helmholtz chamber to manage undesirable frequencies and finishes with black ceramic 89mm tips.
Key Features
- 16-gauge 304 stainless-steel construction
- Helmholtz chamber targets undesirable exhaust frequencies
- Black ceramic 89mm or 3.5-inch exhaust tips
- Manufacturer-rated gains of 6 hp and 5 lb-ft at 6,600 rpm
- Uses the factory mounting locations
- Eliminates operation of the factory exhaust valve
- Dinan emissions code 5 because emissions equipment is unaffected
- Exact Dinan application is identified by manufacturer part number D660-0067-BLK
Application details and restrictions
| Years / Scope | Make | Model / Component | Requirement |
|---|---|---|---|
| 2017-2021 | BMW | M240i Coupe | F22; rear-wheel drive or xDrive |
| 2017-2021 | BMW | M240i Convertible | F23; rear-wheel drive or xDrive |
Dinan's current product page lists the 2017-2021 M240i platform. Confirm the F22 coupe or F23 convertible chassis and the black-tip configuration. Installation requires cutting the factory exhaust at the location specified by Dinan.
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | D660-0067-BLK |
| Product Type | Free Flow axleback exhaust |
| Material | 16-gauge 304 stainless steel |
| Tip Finish | Black ceramic |
| Tip Size | 89mm / 3.5 inches |
| Sound Control | Helmholtz chamber |
| Maximum Rated Gain | +6 hp and +5 lb-ft at 6,600 rpm |
| Estimated Labor | 1.3 hours |
| Emissions | Code 5; emissions unaffected |
| UPC | 813725023977 |
What's Included
- Dinan D660-0067-BLK: One rear axleback exhaust assembly
- Black ceramic exhaust tips
- Application-specific clamps, hangers, and installation hardware identified by Dinan
About Dinan
Dinan develops performance hardware and software for Audi, Volkswagen, Porsche, and related platforms. Its application-specific components are engineered around verified vehicle, engine, transmission, and emissions requirements rather than model name alone.
Related Parts
- No related store product is linked because supporting components must be verified for the exact vehicle, engine, transmission, and current Dinan configuration.
FAQ
What is the D660-0067-BLK?It is axleback exhaust system for the exact application and restrictions shown above.
Which body styles are supported?Dinan lists the F22 M240i coupe and F23 M240i convertible.
Does it support xDrive?Yes. The current Dinan application covers both rear-wheel-drive and M240i xDrive models.
What material is used?The system is made from 16-gauge 304 stainless steel.
What finish is on the tips?This exact configuration uses black ceramic 89mm exhaust tips.
Does the factory exhaust need to be cut?Yes. Dinan's instructions require cutting the original exhaust at the specified location.
What happens to the factory exhaust valve?Dinan states that this axleback eliminates operation of the factory exhaust valve.
What gains does Dinan report?Dinan reports gains of 6 hp and 5 lb-ft at 6,600 rpm.
Installation Instructions
- Confirm the vehicle is a supported F22 coupe or F23 convertible M240i and verify the Dinan D660-0067-BLK part label.
- Allow the exhaust to cool, raise the vehicle at approved lift points, and review Dinan installation document D660-0067.
- Measure and mark the factory exhaust at Dinan's specified cutting location before supporting and cutting the original rear section.
- Deburr the cut tube and install the Dinan axleback, clamps, hangers, and tips in the orientation shown by Dinan.
- Center both tips in the rear openings, verify underbody and bumper clearance, then tighten all joints to Dinan's current values.
- Start the vehicle in a ventilated area, inspect for leaks or contact, and recheck alignment and clamp security after the first complete heat cycle.
