This is a Universal Fitting Product
Product Information
The G8x M3/M4 is arguably superior in every category to its predecessor but in most, if not all, circles the biggest downfall of the platform is in the sound department. Like the F8x before it with the S55, the S58 in the current generation leaves a lot to be desired. While a step in the right direction from its forerunner the stock vocals still carry far too much rasp that do not fully articulate the refined aggressiveness typical of the brands signature performance models. Dinan corrects this weakness with a valved axle back exhaust system that elevates the tone to a deeper, more meaningful note while also delivering an extra level of amplification above and beyond its stock counterpart. Coupled with the optional middle exhaust / x-pipe for the platform an even louder, smoother, and fuller soundtrack is possible.
Through extensive development and testing nearly every possible permutation of the exhaust was attempted. Unlike the previous generation where cabin sound/drone was largely unchanged between the sedan and the coupe, that was not the case with the G8x chassis'. This caused countless iterations to be attempted in the quest for a common system that not only sounded superb externally but one that also didn't introduce an overbearing internal cabin drone on either body type. The result is a system we are confident will be coveted by all for years to come. To achieve desired sound volume and tone worthy of the G8x M3/M4 the tubing was enlarged to 76mm (vs 70mm stock) to allow freer flow, and reduce backpressure, throughout the entirety of the system. The larger piping gives way to multiple pathways as it nears the rear of the vehicle -- the choice of which is utilized determined by the factory exhaust valves which are retained. When valves are closed, flow is directed into the Dinan muffler, where absorption and reactive technologies are used, and exit out the two inner tips. This limits noise during low-speed driving and produces a more subdued, albeit deeper, and agreeable note. However, when the valves are open during high-load conditions the bulk of the gases bypass the muffler altogether for a near straight pipe design and maximum aural enjoyment to be achieved. It's the perfect marriage for all tastes and allows civility or impassioned aggression depending on what the situation demands. The combination is one Dinan has deemed fitting for the marques signature performance models that cater to the tasteful enthusiast who demand the best for all situations.
Visually, the Dinan G8x M3/M4 exhaust has been skillfully crafted entirely out of T304 stainless steel and TIG welded for the best visual appearance and color. The entire system is then brush finished to further guarantee an immaculate looking system out of the box. The attention to detail is not limited to parts of the system you can't see once the exhaust is installed but is also extended to the exhaust tips themselves. The Dinan exhaust includes massive, quad 4.5-inch (114mm) clamp-on, double-walled, polished or black ceramic coated clamp-on tips and laser engraved exhaust tips. Despite the seemingly cartoonish size on paper, the tips mesh seamlessly and fill the factory cut-outs to complete the OEM+ look with a healthy dose of audible attitude.
Features:
- Maximum gains of +6 HP and +5 lb-ft of torque
- Enjoyably louder, sportier sound
- Drone abatement technologies used to reduce cabin resonance
- Four, diffuser filling, 4.5-inch (114mm) double-walled, polished or black ceramic coated clamp-on tips with laser engraved Dinan logo
- Larger diameter piping for increased flow (76mm vs. 70mm)
- 6-pounds lighter than the stock axle back (Stock: 44-pounds vs. Dinan: 38-pounds)
- Stock exhaust valve actuators reused, and operation of exhaust valve is unchanged so exhaust tone can be adjusted via the M-drive settings
- Computer controlled exhaust valves are retained and limit noise during low-speed driving and open fully during high-load conditions
- 100% 304 Stainless Steel construction
- Factory-like fitment with included mounting hardware
What's Included:
- DINAN Valved Axle-Back Exhaust
Model  +  |
Drivetrain  |
|---|---|
| G80 M3 3.0T I6 [S58] | + |
| G82 M4 3.0T I6 [S58] | + |
| G83 M4 3.0T I6 [S58] | + |
***ORDER CANCELLATIONS***
All order cancellations are processed during regular business hours only. Any order cancellation requests made outside of business hours will be processed during the next business day.
Any cancelled orders including orders that have not shipped will be subject to a 3.5% cancellation fee to offset order processing fees that are not refunded to BMP Tuning. Additionally, if your order has already shipped, you may incur additional fees if the shipment needs to be recalled and/or rerouted back to BMP Tuning.
Some products sold cannot be cancelled after the order has been placed due to agreements with the manufacturer, or in the case of made to order/custom items. This will be noted in the product description.
Please note: Cancellations made after hours, on the weekend, or on a holiday may not be processed for cancellation prior to the order being processed and shipped.
***RETURNS AND EXCHANGES***
BMP Tuning will accept returns for UNUSED merchandise in original packaging within 1 YEAR from the time of purchase!
UNUSED products in ORIGINAL PACKAGING that are RETURNED WITHIN 60 DAYS of purchase are eligible for a refund to the original payment method used.
UNUSED products in ORIGINAL PACKAGING returned PAST THE 60 DAY MARK and within the 1 year return period are eligible for store credit only. After 60 days, non-stocked items will be accepted at the discretion of BMP Tuning.
UNUSED products MUST BE IN ORIGINAL PACKAGING, containing all accessories, labels, and documentation.
**CUSTOMERS ARE RESPONSIBLE FOR ORIGINAL AND RETURN*** ***SHIPPING EXPENSES**
The customer is responsible for the return shipping costs/fees – original shipping fees are NON-REFUNDABLE and items shipped with FREE shipping will still be subject to actual shipping charges being NON-REFUNDABLE. BMP Tuning is not responsible for damage to items being returned to us by the shipping carrier and will contact you so that you can file a claim if an item arrives damaged.
Any returned item is subject to a fee of up to 15%.
Restocking fees are WAIVED in the event of a customer receiving a damaged / incorrect product.
KATAPULT: Katapult does not allow us to issue partial refunds. Katapult orders that are cancelled prior to fulfilment will be refunded 100% directly through Katapult. For Returns: Any Katapult purchases that require a partial refund will be given back to the customer as a store credit. No restocking fees will be deducted. However, the original shipping costs on the order will be deducted and the customer will also be responsible for the shipping costs to return item(s) to BMP Tuning.
***THERE ARE ABSOLUTELY NO RETURNS ON ANY ITEMS MARKED AS "SCRATCH & DENT", "OPEN BOX", "USED", OR OTHER "SPECIAL ORDER" ITEMS***
***PLEASE CONTACT US BY EMAIL / PHONE / MESSAGE TO***
***INITIATE A RETURN!***
***APPLICATION/FITMENT ISSUES***
If you need to return an item that does not fit your vehicle and you feel that there is an error in our listing, please contact us immediately. If we find an error on our website or on behalf of a BMP Tuning Representative, we will provide a shipping label for your return and arrange proper shipment of the correct items.
ALL PRODUCTS MUST STILL BE NEW CONDITION IN THE ORIGINAL BOXES, INCLUDING LABELING, HARDWARE, AND DOCUMENTATION.
Customers are responsible for checking the product description for applications prior to ordering anything from our site to verify that the items you have selected are appropriate for your vehicle. Items ordered that are listed correctly on our website but ordered in error WILL REQUIRE SHIPPING TO BE PAID BY THE CUSTOMER.
***DAMAGED/MISSING ITEMS IN SHIPMENT***
If you receive a package that is missing items or was damaged during shipment, please contact BMP Tuning WITHIN 10 DAYS OF DELIVERY. Please check all items as they are delivered! Be sure to keep all packing material, boxes and photos of the damage as this will be necessary to complete the damage claim with the specific courier. UPS/FED EX Typically take 8-15 business days to complete their investigation, however, this time frame could be extended depending on circumstances.
***PRICING***
While we always try to provide the most accurate product and pricing information, we are humans and can make mistakes. If we listed an incorrect price or information for any product on our site, BMP Tuning reserves the right to refuse or cancel any orders placed.
PRICING AND AVAILABILITY ARE SUBJECT TO CHANGE WITHOUT NOTICE.
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