Exhaust› Exhaust Pipes, Systems and Components

Dinan

High Flow Middle Exhaust

$870.00

SKU: D660-0094-DINAN

Out of Stock
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Dinan High Flow Middle Exhaust is a mid-pipe exhaust system designed for the BMW M3 and M4 (G80/G82/G83). It replaces the factory center section with larger 3-inch T304 stainless steel tubing for improved flow. This system incorporates an X-pipe crossover to promote even exhaust flow and a smoother, louder, and sportier sound.

Constructed from 100% 304 stainless steel, this mid-pipe replaces the stock resonators between the secondary catalysts and the rear muffler, contributing to increased volume. It is 5 pounds lighter than the stock mid-section, weighing in at 17 pounds compared to the stock 22 pounds. The system features factory-like fitment and includes all necessary mounting hardware.
Show original supplier description
The Dinan High Flow Middle Exhaust is a direct-fit replacement mid-pipe designed to enhance the external acoustics of your G8x BMW M3 or M4. This system elevates the exhaust tone and increases volume over the stock setup while retaining the factory muffler, offering a budget-friendly upgrade. Constructed from 3-inch (76mm) T304 stainless steel tubing, this mid-pipe replaces the factory center section from the secondary catalysts back to the axle-back, including both resonators. Dinan incorporates a specially crafted X-pipe made from mandrel-bent tubing to minimize restriction and promote even exhaust flow to both banks of tips. This design reduces unwanted sound nuances often found in stock systems, resulting in a louder, smoother, and fuller exhaust note. The system's construction features 100% 304 stainless steel tubing and replaces the stock resonators for increased volume. It is also 5 pounds lighter than the factory mid-section, weighing 17 pounds compared to the stock 22 pounds. The recommended labor time for installation is 1.5 hours. This mid-pipe is confirmed to fit with Dinan Free Flow Axle Back and stock exhaust systems (including M Performance axle-back units). Fitment with other axle-back exhaust systems may vary. It is specifically designed for 2021-2026 BMW M3 and M4 models (G80/G82/G83).

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandDinan
Part NumberD660-0094-DINAN
CategoryExhaust
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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