Skip to product information
Dinan 18-25 BMW X3 M40i/X4 M40i (G01/G02) Valved Catback Exhaust System - Black Tips
SKU: DNND660-0099-BLK
Sale price
$2,049.95 USD
Regular price
$2,306.95 USD
Shipping calculated at checkout.
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.
Installation Instructions- 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
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2018-2024 | BMW | X3 | M40i |
| 2019-2025 | BMW | X4 | M40i |
DINAN FREQUENTLY ASKED QUESTIONS
HOW DO I CONFIRM A DINAN PART FITS MY VEHICLE?
Start with the year, make and model selector, then confirm the chassis code, engine, drivetrain and any application notes on the product page. BMW and MINI models from the same year can use different engines or hardware. If anything is unclear, contact FI Performance with your VIN and the Dinan part number before ordering.
DO CHASSIS CODE, ENGINE AND FACTORY OPTIONS MATTER?
Yes. Dinan fitment can depend on chassis generation, engine code, production date, transmission, rear- or all-wheel drive, factory suspension, brake package and other equipment. A model name alone is not always enough to establish fitment.
DO DINAN INTAKES AND AIRFLOW PARTS REQUIRE TUNING?
Many Dinan intake and airflow upgrades operate safely without additional software, while some applications achieve their advertised results only when paired with compatible tuning or supporting hardware. Follow the requirements listed for the exact part number and vehicle application.
WHAT SHOULD I EXPECT FROM A DINAN EXHAUST?
Dinan exhaust systems are designed to add a deeper, more purposeful tone while maintaining refined street manners. Sound level, cold-start volume and cabin presence vary by vehicle, exhaust section, drive mode and other installed components. Review the exact product description before ordering if sound level is a primary concern.
WILL DINAN SUSPENSION OR CHASSIS PARTS CHANGE RIDE QUALITY?
They can. Springs, dampers, sway bars, braces and related chassis parts may produce a firmer or more controlled ride depending on the combination and settings used. A professional alignment is recommended after installing components that alter ride height or suspension geometry.
WHAT IS REQUIRED AFTER INSTALLING DINAN BRAKE PARTS?
Brake components must be installed to the vehicle and product specifications. New pads and rotors should receive the correct bedding procedure, and the system should be inspected for proper operation before normal driving. Brake work should be completed by a qualified technician if you do not have the required tools and experience.
DO DINAN ENGINE AND TUNING PRODUCTS REQUIRE SPECIAL INSTALLATION?
Requirements vary. Some inline modules are designed for straightforward sensor connections, while software, turbochargers and other advanced engine upgrades may require special tools, programming, supporting modifications or professional installation. Use Dinan's instructions for the exact part number and do not substitute instructions from another application.
HOW DO I CHOOSE THE CORRECT WHEELS, SPACERS AND HARDWARE?
Confirm wheel diameter, width, offset, center bore, brake clearance and tire fitment for the vehicle. Spacers must use the correct bolt pattern, hub fitment and matching extended hardware where required. Never stack wheel spacers, and always follow the specified torque procedure and recheck schedule.
HOW ARE DINAN EXTERIOR AND INTERIOR PARTS INSTALLED?
Installation ranges from direct replacement to adhesive bonding, trimming or removal of factory panels. Dry-fit cosmetic parts before final installation and follow the supplied surface-preparation and curing instructions. Professional installation is recommended for carbon-fiber pieces or any part requiring permanent modification.
ARE DINAN DRIVETRAIN AND SHIFTING UPGRADES STREET FRIENDLY?
Dinan designs many drivetrain and shifting upgrades to improve response and driver engagement without sacrificing everyday usability. Increased shift effort, vibration or mechanical feedback can still occur depending on the part and vehicle. Check the product notes for the expected change before purchase.
ARE ALL DINAN PERFORMANCE PARTS EMISSIONS LEGAL?
No. Emissions status is part- and application-specific. Some products are 50-state legal, some are not legal for sale or use in California, and others may be intended only for competition vehicles. Review the emissions statement and any CARB Executive Order listed for the exact part and vehicle before ordering or installing it.
WHO SHOULD INSTALL DINAN PERFORMANCE PARTS?
Installation difficulty varies by category and application. Always review Dinan's part-number-specific instructions first. Safety-critical, software, engine, suspension, brake and permanently bonded components should be handled by a qualified performance shop when the procedure exceeds your tools or experience.
WHAT WARRANTY APPLIES TO DINAN PRODUCTS?
Warranty coverage varies by product, vehicle and installation. Dinan states that its performance products generally carry a two-year, unlimited-mileage warranty, while certain qualifying products or applications may have different or factory-matching coverage. Warranty does not cover problems caused by improper installation, misuse, misapplication, modification or neglect. Review the current Dinan warranty terms for the exact product before purchase.
Things that could pair well together with what you are looking at...
