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Dinan High Flow Middle Exhaust BMW G80 M3 / G82 M4

SKU: DNND660-0094
Sale price
$899.95
Regular price
$1,012.95
You save
11%
Currently Backordered - You can still place your order and we'll ship your order as soon as the product is back in stock!

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Installation Services

Don’t worry about the hassle — let our expert team at Forza Motorworks handle the installation for you. Our professional installation ensures everything fits and operates exactly as intended, giving you clean, factory-quality results, proper wiring or mounting, and avoiding the risks of DIY mistakes. You’ll save time, avoid frustration, and get peace of mind knowing the job is done right the first time. Contact us to learn about our installation services and enjoy a seamless upgrade from day one.

FAQ

Shipping Information
For items that are in stock, purchases made after 9am EST will be usually be shipped out in the next 1-2 business days. Please inquire to confirm lead times if you have specific time constraints. Orders will be sent via signature required at our discretion unless otherwise requested.

International Shipping
Any and all customs duties, taxes, import fees, and/or tariffs assessed in connection with the purchase shall be the sole responsibility of the customer/end user.

Return Policy
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return. To be eligible for a return, your item must be in the same condition that you received it, unused and in its original packaging. All returns are subject to a restocking fee based on item and package condition. Buyer is responsible for paying for return shipping costs. If you need a return label, we will email you a return label and deduct cost from refund. Original shipping costs are not refundable. Special order items are not eligible for return.

Cancellation Policy
In order to cancel your order you must email within 24 hours of placing your order or before your order has shipped, whichever occurs first. Special order items are not eligible for cancelation.

Exchange Policy
We have a 30-day exchange policy, which means you have 30 days after receiving your item to request an exchange. To be eligible for an exchange, your item must be brand new in box. Buyer is responsible for paying all shipping costs to exchange product.

Product Description

The Dinan High Flow Middle Exhaust is one of the best sound upgrades available for the BMW G8X M3 and M4 platform, delivering a deeper, smoother, and more aggressive exhaust note without replacing the factory rear muffler. Designed as a direct replacement for the restrictive factory center section, this system removes the OEM resonators and incorporates a free-flowing X-pipe design to unlock the true character of BMW's twin-turbocharged S58 engine.

Unlike many midpipe upgrades that create excessive rasp or unwanted drone, Dinan engineered this system to improve exhaust tone and volume while maintaining a refined sound profile. The integrated mandrel-bent X-pipe helps balance exhaust flow between both banks, producing a smoother and fuller exhaust note throughout the RPM range.

Constructed from premium T304 stainless steel and utilizing larger 3-inch tubing throughout, the Dinan High Flow Middle Exhaust improves exhaust flow while reducing weight compared to the factory center section. Whether paired with the factory axle-back exhaust or the Dinan Valved Axle-Back System, this upgrade delivers a noticeable improvement in sound every time you start the car.

Fitment Notes

  • Fits BMW G80 M3 (2021-2026)
  • Fits BMW G82 M4 Coupe (2021-2026)
  • Fits BMW G83 M4 Convertible (2021-2026)
  • Designed for vehicles equipped with the BMW S58 twin-turbocharged engine
  • Direct replacement for the factory center exhaust section
  • Compatible with the factory rear muffler system
  • Compatible with BMW M Performance axle-back exhaust systems
  • Confirmed fitment with Dinan Valved Axle-Back Exhaust systems
  • Professional installation recommended
  • Does not modify or remove emissions equipment

Included

  • Dinan High Flow Middle Exhaust assembly
  • Integrated mandrel-bent X-pipe section
  • T304 stainless steel tubing
  • Installation hardware
  • Mounting components required for installation

Product Specs

  • Part Number: D660-0094
  • Material: T304 Stainless Steel
  • Tubing Diameter: 76mm (3.0-inch)
  • Factory Tubing Diameter: 70mm (2.75-inch)
  • Configuration: Resonator Delete X-Pipe
  • Weight: 17 lbs
  • Factory Midpipe Weight: 22 lbs
  • Weight Savings: Approximately 5 lbs
  • Construction: Mandrel-bent tubing
  • Installation Time: Approximately 1.5 hours
  • Emissions Impact: No impact on emissions equipment

Product Features

  • Produces a deeper, louder, and smoother exhaust note
  • Mandrel-bent X-pipe improves exhaust scavenging and flow balance
  • Larger 3-inch tubing reduces restriction versus factory exhaust
  • Deletes factory resonators for increased volume and character
  • Saves approximately 5 lbs over the OEM center section
  • Compatible with factory and Dinan axle-back exhaust systems
  • Premium T304 stainless steel construction for long-term durability
  • Factory-style fitment with bolt-on installation

Why Choose the Dinan High Flow Middle Exhaust?

For many G80 M3 and G82/G83 M4 owners, the factory exhaust lacks the volume and excitement expected from a modern M car. The Dinan High Flow Middle Exhaust addresses this by replacing the most restrictive section of the factory exhaust system with a larger, freer-flowing X-pipe design that dramatically improves sound quality without requiring a full exhaust replacement.

Whether installed on an otherwise stock vehicle or paired with a Dinan Valved Axle-Back Exhaust, this upgrade delivers the aggressive tone, improved flow, and premium build quality enthusiasts expect while maintaining the refinement that makes the G8X platform such an exceptional daily driver.

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