Dinan High Flow Mid-Pipe – BMW M240i (F22)

OVERVIEW

The Dinan High Flow Mid-pipe for the F22 / F23 M240i pulls an aggressive tone out of the stock system, and paired with the matching Dinan axle-back it sharpens into a growl that is hard to ignore. The full mid-section removes the factory center pipe including both resonators and replaces it with straight-through 3.25" T304 stainless steel tubing for better flow and better sound, shedding three pounds in the process.

SPECS

• Deletes both resonators between the catalyst and the rear muffler
• Stock hydro-formed 80mm piping is replaced by 3.25" (82.6mm) mandrel-bent piping
• 100% T304 stainless steel construction
• Weight: 21 lbs versus 24 lbs stock — 3 lbs lighter
• Bolt-on installation; mounting hardware included
• Emissions, per Dinan: “This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.”
• Dinan warranty: if the vehicle is still covered by the BMW new-car limited warranty, the part is warranted for the remainder of that coverage, limited to 4 years / 50,000 miles; otherwise 2 years, unlimited mileage from the date of original purchase. Wear items, maintenance parts and fluids are excluded.

PARTS INCLUDED

• 1x Midpipe, front (D662-0423)
• 1x Midpipe, rear (D662-0474)
• 3x 80mm clamp (D662-9247)

TECH RESOURCES

Additional Parts Required

• None. Dinan specifies no additional hardware for this part — the clamps needed to fit it are supplied.
• Compatibility: Dinan confirms fitment only with the stock axle-back or the Dinan Free Flow Axle-Back Exhaust for the 2017-2021 M240i. Fitment with other axle-back systems is not guaranteed.
• Customer-supplied tools and a vehicle lift are required.

Installation

• Dinan D660-0068 High Flow Midpipe — installation instructions (PDF)

Notes

• Dinan’s installation instructions are written for the 2017 F22 M240i and M240i xDrive; Dinan catalogs the part for the 2017-2021 M240i.

PART NUMBER

• D660-0068

VEHICLE APPLICATIONS