Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededDINANPART NUMBER: 421-D660-0077BLK
D660-0077-BLK Dinan Free Flow Axle-Back Exhaust, 2017-2020 BMW 440i
$1,64995
Ships on 09/29/2026
Lowest Price GuaranteeDinan Free Flow Axle-Back Exhaust2017-2020 BMW 440i Stainless Steel Black Tips
Dinan 421-D660-0077-BLK Features:
Dinan engineers designed the F33/F36 440i exhaust to improve exhaust flow by reducing back pressure, resulting in increased power output and a great sporty sound that is civilized when you want it to be, and pleasantly aggressive under hard acceleration. Not only is the tone improved but the additional burbles and pops that come with it are simply intoxicating. Dinan also incorporates a Helmholtz chamber design that reduces resonance or"drone" at low RPM.The system is built to exacting specifications to ensure the perfect fit using the factory hangers. It is made from 100% 16 gauge 304 stainless steel and will resist corrosion for years to come. The design features twin 89mm (3.5") polished or ceramic black exhaust tips for a tasteful high-performance look.The factory computer-controlled exhaust valve is eliminated.- More Power: + 6 HP @ 6600 RPM, + 5 LB-FT @ 6600 RPM
- Helmholtz chamber to reduce drone
- Enjoyably louder, sportier sound
- Twin 89mm (3.5") laser engraved, polished or ceramic black exhaust tips
- 100% 304 stainless steel construction
- Uses the factory brackets and hangers for a factory-like fitment
Part TypeExhaust System
BrandDINAN
Package Height11.0
Package Width30.0
Package Length48.0
Weight45.0 PG
Part CategoryPerformance Parts
Estimated Horse Power Gain6 @ 6600 RPM
Maximum Torque (Ft-Lb)5 @ 6600 RPM
Part FitmentSemi Universal
Tip FinishBlack Ceramic Coated
Vendor Part NumberD660-0077-BLK
Package Qty1
Package TypeEA
No Questions
No Reviews
Some parts are not legal for use in California or other states with similar laws / regulations
