See all Exhaust Parts products
Product thumb
Dinan Freeflow Catback Exhaust Black BMW X3 M40i | X4 M40i 2018-2025
$1899.95
Looking to elevate the acoustics of your X3 M40i / X4 M40i with an exhaust system that not only offers a much improved sound while retaining the the flexibility associated with valves, but also raises the eye appeal beyond the mundane? Look no further than the Dinan valved cat-back to meet all your needs and then some!

The full cat-back requires no cutting and utilizes factory mounting locations that allow the Dinan exhaust system to be a straightforward and painless install. Fabricated from brushed 100% T304 stainless steel, TIG welded and free of hydroformed pipe, the upgraded system is also a marked improvement from its predecessor both in terms of material/construction as well as in overall looks. The most glaring change being the replacement of the OEM dual slip tips in favor of an M-inspired quad tip configuration. Despite the limited room, Dinan was determined to offer four individually functioning pathways/tips and not lessen the representation with Y-tips or other gimmickry. The result is a proper quad setup furnished with cavity covering 3.75-inch (95mm) tips in either black ceramic or polished stainless ensuring the system can be appreciated even before it is heard.

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.



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


Fitment:
  • BMW X3 M40i | X4 M40i 2018-2025
Proposition 65

WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Dinan Banner

Who is Dinan?

Dinan was founded in 1979 and has since established itself as North America’s premiere BMW tuner. The company produces the most comprehensive product line of high-performance parts and systems which are also distributed in selected BMW dealerships and independent BMW High-performance service facilities. Today, they have expanded their product range by offering their products for other European brands as well such as Mini and Mercedes Benz.

European Car Experts

Dinan has consistently produced quality parts and is considered as a company who serves the industry-leading warranty program. This has helped the company become a household name for the majority of BMW enthusiasts.

The company is known to produce parts that are reliable and enhance the performance of the cars. As proof, reputable publications have conducted road tests on vehicles equipped with Dinan products, and the results show that these vehicles are at par with some of the most exotic cars in the world. 

The company offers a variety of products ranging from suspension parts, electronics, drivelines, chassis tuning components, and engines. Dinan understands that every BMW driver wants to improve their vehicle. Hence, they produce products that bring out the best out of the vehicle. They have become the brand of choice by tuners who demand the best, and Dinan has consistently given it to them over the years.

Purchase Dinan Products at Vivid Racing

European cars are known to be the most reliable and top-performing cars in the market. But it does not hinder enthusiasts to further exploit its potential. Dinan is the expert when it comes to improving these cars and has been trusted by many. Visit Vivid Racing and check out their list of products that would fit your specific requirement.

We consider our limited warranty coverage to be a very important component of each Dinan Performance Product and we want you to fully understand it. Dinan's objective is to enhance the enthusiast's driving experience by designing and manufacturing the best performing and highest quality automotive products possible. Our limited warranty is intended to cover Dinan products when they are used in the manner for which they were originally designed. Like any manufacturer, we cannot be responsible when our products are subjected to misuse, improper installation, misapplication, modification or neglect. Consumers are encouraged to familiarize themselves with the specifics of Dinan's Limited Warranty, including exclusions and potential effects to the manufacturer's limited new car warranty, prior to making the decision to purchase and install Dinan products and systems. Consumers are invited to contact Dinan at 408-779-8584 with any questions regarding Dinan's limited warranty coverage, procedures, exclusions, etc.

Enthusiast customers should also be aware of the Magnuson Moss Warranty Act which can be viewed in its entirety here.

CARS COVERED BY THE ORIGINAL VEHICLE MANUFACTURER'S NEW CAR LIMITED WARRANTY

US and Canadian Specification Vehicles Only. Outside of the aforementioned areas please contact your importer for details.

If your vehicle is currently covered by the vehicle manufacturer's new car limited warranty, Dinan products are warranted for the remaining term of the vehicle manufacturer's new car limited warranty. The manufacturer's new car warranty is limited to 4 years or 50,000 miles (80,000 kilometers in Canada), commencing on the date of first retail sale or the date the vehicle is first placed in-service as a demonstrator or company vehicle, whichever is earlier. Dinan's warranties are transferable when ownership of the vehicle into which the Dinan products were originally installed is sold.

To obtain service under this warranty, the vehicle must be brought, upon discovery of a malfunction or defect in materials and/or workmanship, to the workshop of any Authorized Dinan Dealer, during normal business hours. Proof of purchase in the form of a lawful invoice is required. The Authorized Dinan Dealer will, without charge for parts or labor, repair or replace the defective Dinan component(s), as well as any original vehicle manufacturer's component(s) that may have been directly affected by a Dinan component, using new or authorized remanufactured parts. The decision to repair or replace said parts is at the sole discretion of Dinan and/or the original vehicle manufacturer. Parts for which replacements are supplied under this limited warranty become the property of Dinan and/or the original vehicle manufacturer. In all cases, a reasonable period of time must be allowed for warranty repairs to be completed after the vehicle is delivered to the Authorized Dinan Dealer.

CARS NO LONGER COVERED BY THE ORIGINAL VEHICLE MANUFACTURER’S NEW CAR LIMITED WARRANTY

Dinan Performance Products are warranted for a 2-year, unlimited mileage period from the date of original purchase. Dinan's warranties are transferable when ownership of the vehicle into which the Dinan products were originally installed is sold.

To obtain service under this warranty, the vehicle or Dinan product must be brought, upon discovery of a malfunction or defect in materials and/or workmanship, to any Authorized Dinan Dealer during normal business hours. In the event of a warranty claim, Dinan will repair or replace, at its sole discretion, any defective Dinan component upon receipt of the item and proof of the original purchase in the form of a lawful invoice. This warranty does not include reimbursement for repairs to any original vehicle manufacturer's component(s) that may have been affected by a Dinan component. Labor charges associated with the repair or replacement of a Dinan product will be reimbursed at the Authorized Dinan Dealer’s standard hourly rate, based upon the original vehicle manufacturer's and/or Dinan's schedule of flat rate labor times. The defective component must be returned to Dinan for verification of the defect before any warranty adjustment will be made. A reasonable period of time must be allowed for warranty replacement, shipping and/or repairs to be completed after the vehicle or product is received by an Authorized Dinan Dealer or Dinan's facility.

DINANTRONICS SPORT PRODUCT WARRANTY

DINANTRONICS Sport products are warranted against material and workmanship defects for a 1-year, unlimited mileage period from the date of original purchase. This warranty does not cover any consequential damages (neither parts nor labor) that may be caused as a result of the installation or use of this product.

To obtain service under this warranty, Dinan tech support must be made aware of the malfunction or defect in materials and/or workmanship of the DINANTRONICS Sport module upon discovery, via an Authorized Independent Dinan Dealer or directly to Dinan during normal business hours. In the event of a valid warranty claim, Dinan will repair or replace, at its sole discretion, any defective Dinan component upon receipt of the item and proof of the original purchase in the form of a lawful invoice. In the event of a defect the defective unit must be returned to Dinan for verification of the defect before any reimbursements will be issued. A reasonable period of time must be allowed for warranty replacement, shipping and/or repairs to be completed after the product is received by an Authorized Dinan Dealer or Dinan's facility.

REFURBISHED PRODUCT WARRANTY

Refurbished products are warranted against material and workmanship defects for a 90-day, unlimited mileage period from the date of original purchase. This warranty does not cover any consequential damages (neither parts nor labor) that may be caused as a result of the installation or use of this product.

To obtain service under this warranty, Dinan tech support must be made aware of the malfunction or defect in materials and/or workmanship of the refurbished product upon discovery, via an Authorized Independent Dinan Dealer or directly to Dinan during normal business hours. In the event of a valid warranty claim, Dinan will repair or replace, at its sole discretion, any defective Dinan component upon receipt of the item and proof of the original purchase in the form of a lawful invoice. In the event of a defect the defective unit must be returned to Dinan for verification of the defect before any reimbursements will be issued. A reasonable period of time must be allowed for warranty replacement, shipping and/or repairs to be completed after the product is received by an Authorized Dinan Dealer or Dinan's facility.

RACING ONLY PRODUCTS

Due to the nature of the intended use, Dinan Racing Products are guaranteed against defects in workmanship only. These products are not warranted against wear and/or failure under any circumstances. These products do not fall under the standard Dinan Limited Product Warranty. Racing-only parts may also affect the BMW warranty and emissions warranty.

The Dinan Limited Warranty Specifically Excludes:

Return shipping charges, towing charges, rental car fees damage to a component or assembly due to the installation of replacement parts with specifications that differ in any material respect from the original vehicle manufacturer's or Dinan parts, damage resulting from the unauthorized modification of a Dinan part or assembly, damage resulting from the use of other manufacturer's products in conjunction with Dinan products or systems, damage to the clutch due to power shifting or abuse, brake rotor warp, friction materials, maintenance services and parts when replaced during maintenance such as spark plugs, lubricants, fluids, engine tune-up parts, replacement of filters, coolant and refrigerant, mechanical adjustments or repairs which result from normal wear and tear, drive-belts, light bulbs, damage due to the failure to perform maintenance services at the specified intervals or in accordance with the instructions in the owner’s manual from the original vehicle manufacturer or Dinan's product instructions, damage attributable to negligence or abuse, improper installation, improper treatment or treatment contrary to the instructions in the owner’s manual from the original vehicle manufacturer or Dinan's product instructions, engine damage resulting from alteration of Dinan's original boost pressure, damage resulting from the use of improper or contaminated fuel, damage occurring through corrosion resulting from weak or improper coolant, damage to a Dinan component as a result of a collision or improper collision damage repairs, any vehicle operated in any competitive event or subjected to aggressive track conditions, custom-designed competition parts, damages resulting from loss of time, inconvenience or loss of the use of the vehicle, damage resulting from environmental influences, flood, accident, fire damage, or road salt corrosion, re-manufactured or refurbished products or components (these products are clearly identified as re-furbished and are warranted for the period specified for that particular product).

General

The installation of Dinan Performance Products and systems may affect the vehicle manufacturer's new car limited warranty. The vehicle manufacturer's new car limited warranty may not apply to modifications to a vehicle or the installation of any performance accessories or components attached to the vehicle which substantially alter the original engineering and/or operating specifications or which result in damage to other original vehicle manufacturer's components.

This warranty shall be null and void if the vehicle identification number has been altered or cannot be read, if the odometer has been replaced or altered and the true mileage cannot be determined, if the vehicle has been declared a total loss or sold for salvage purposes, or if the vehicle has been used in any competitive event.

These warranties give you specific legal rights, and you may also have other rights, which vary, from state to state.

The duration of any implied warranties, including the implied warranty of merchantability and fitness for a particular use, is limited to the duration of the express warranties herein. Dinan hereby excludes incidental and consequential damages, including loss of time, inconvenience, or loss of the use of the vehicle, for any breach of any express or implied warranty, including the implied warranty of merchantability and fitness for a particular use, applicable to the product.

Some states do not allow limitations on how long an implied warranty lasts, or the exclusion or limitation of incidental or consequential damages, so the above limitations and exclusions may not apply to you.

Statement Revised 08/03/2018

You're seeing this because you're logged into an employee account or you're accessing the site through an internal IP address. This information is not normally visible.
Things
Sale price None
Wholesale price $1,569.36
Shipping Weight: 1.00
Length: ?
Width: ?
Height: ?
Product Added At Tuesday 08 April, 2025
Product Modified At Thursday 10 July, 2025
Imported By ETLOverride
Last Edited By vendordata@vividracing.com
View In Admin
Vendors
Some placeholder content for the collapse component. This panel is hidden by default but revealed when the user activates the relevant trigger.
Vendor Inv Cost Retail Jobber MAP Core Updated
Holley Performance Products Inc. $1,329.97 $2,137.95 ? $1,899.95 ? 2025-07-10 19:27:53


Check out these other great products