Dinan G01/G02 BMW X3 M40i/X4 M40i Valved Catback Exhaust System with Black Tips

While looks are important, the auditory advantages are what any enthusiast is truly after with an exhaust system, and the Dinan offering for the G01/G02 M40i platform delivers in spades. For not only aural enhancement via the elimination of the central collector/resonator, but also weight savings and simplicity. The stock single-to-dual pipe setup has been abandoned in favor of an enlarged, straight, unrestricted, and freer flowing single pipe system. This pathway feeds into a Helmholtz equipped muffler that limits frequencies associated with drone, as well as assists in altering the overall tone of the setup to deliver the signature low Dinan rumble. The no-nonsense design allows versatility in volume levels with the retained factory valve functionality. Go from refined when cruising (low RPM’s) to rowdy when in it (high RPM’s), with ease. Or better yet, pair the system with an exhaust valve remote and have full control of elevating or reducing the sound! When open, the system behaves as a straight pipe solution that promotes maximum flow and volume for an exhilarating and forceful chorus. When the valve is closed however, exhaust gases are wholly redirected through the muffler and emit more tempered vocals acceptable for even the most sensitive ears. It is the perfect blend of civility when cruising or the full spectrum of auditory delight when in the throttle. No matter the situation, the Dinan valved cat-back exhaust system is the answer for the discerning enthusiast looking for sound without sacrifice. Stainless Steel - Black Tips - G01/G02

• Factory-like fitment with included mounting hardware and valve componentry for both pre-LCI and LCI compatibility
• Quad 3.75-inch (95mm) double-walled, black ceramic coated, clamp-on tips with laser engraved Dinan logo
• Factory valve functionality retained; refined or rowdy from the same exhaust
• 7-pounds lighter than the stock system (60-pounds vs. Dinan: 53-pounds)
• Enjoyably louder, sportier sound w/ a delightful octave drop
• Drone abatement technologies used to reduce cabin resonance
• Larger diameter piping for increased flow (83mm vs. 80mm)
• Factory resonator/collector removed for increased volume
• Direct bolt-on w/ no cutting or welding required
• Maximum gains of +6 HP and +5 lb-ft of torque
• 100% 304 Stainless Steel construction

Enhance your BMW X3 M40i or X4 M40i with the Dinan Part Number dnnD660-0099-BLK valved catback exhaust system, designed for a perfect fit on models from 2018 through 2023. Crafted from 304 stainless steel and finished with sleek black quad 3.75-inch double-walled ceramic coated tips, this system offers a bold and aggressive appearance alongside its performance benefits. The system features larger diameter piping, increasing flow capacity to 83mm from the stock 80mm, which translates into improved horsepower and torque. The removal of the factory resonator and collector amplifies the exhaust volume, delivering a more spirited sound that complements the vehicle's dynamic character. The system's straightforward bolt-on installation requires no cutting or welding, making it accessible for enthusiasts and professionals alike. The design retains factory valve functionality, allowing seamless transition between refined and aggressive exhaust tones. When the valves are open, the exhaust behaves as a straight pipe, producing maximum flow and volume for an exhilarating auditory experience. When closed, the system directs gases through the muffler, providing a more subdued and comfortable tone suitable for everyday driving. This setup effectively reduces cabin resonance through drone abatement technologies, ensuring a pleasant ride regardless of sound level. The combination of increased flow, weight savings of approximately 7 pounds, and enhanced sound quality offers a notable upgrade in both performance and auditory enjoyment. Whether cruising or accelerating, the Dinan valved exhaust system provides the perfect balance of civility and sportiness, elevating your driving experience with a signature low rumble and an octave drop that’s sure to turn heads.

Features:

• Factory-like fitment with included mounting hardware and valve componentry for both pre-LCI and LCI models

• Quad 3.75-inch double-walled black ceramic coated tips with laser engraving of Dinan logo

• Retains factory valve functionality for refined or aggressive sound modes

• Lighter weight—approximately 7 pounds less than stock system

• Enhanced sound profile with a louder, sportier tone and octave drop

• Drone reduction technology for improved cabin acoustics

• Increased piping diameter for superior exhaust flow and performance

• Factory resonator and collector removal for higher volume output

• Direct bolt-on installation with no cutting or welding required

• Maximum gains of +6 horsepower and +5 lb-ft of torque

• Constructed from 100% 304 stainless steel for durability and corrosion resistance

Fitments:
2018 BMW X3 M40i
2019 BMW X3 M40i
2019 BMW X4 M40i
2020 BMW X3 M40i
2020 BMW X4 M40i
2021 BMW X3 M40i
2021 BMW X4 M40i
2022 BMW X3 M40i
2022 BMW X4 M40i
2023 BMW X3 M40i
2023 BMW X4 M40i
2024 BMW X3 M40i
2024 BMW X4 M40i
2025 BMW X4 M40i

Air Freight Prohibited: false
Not Carb Approved: false
Carb Acknowledgement Required: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1
Number Of Boxes: 2