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Dinan 19-25 BMW X4 M40i Freeflow Axleback Exhaust System | BMW X4 M40i (G02) D660-0099

Dinan 19-25 BMW X4 M40i Freeflow Axleback Exhaust System | BMW X4 M40i (G02) D660-0099

D660-0099

In stock

$2,049.95 USD
$2,306.95 USD $2,049.95 USD
ADDITIONAL DISCOUNTS APPLIED AT CHECKOUT Sold out

The Dinan 19-25 BMW X4 M40i Freeflow Axleback Exhaust System is a high-performance cat-back exhaust designed to enhance both sound and flow for the G01/G02 M40i platform. Constructed with a polished finish, this system eliminates the central collector and resonator to improve exhaust note and reduce weight. It features an enlarged, straight, and unrestricted single pipe that feeds into a Helmholtz-equipped muffler, which helps limit drone frequencies and modifies the overall tone to produce the signature low Dinan rumble. The system offers a versatile sound profile, allowing drivers to switch between refined cruising and aggressive throttle responses, especially when paired with an exhaust valve remote for full control over volume and tone.

This exhaust system is compatible with 2019-2025 BMW X4 M40i models, specifically designed for the G01/G02 chassis. It retains the factory valve functionality, enabling seamless transition between quiet and loud modes, making it suitable for street and spirited driving. Installation is a bolt-on upgrade that replaces the stock axleback, providing improved performance and sound without sacrificing civility. The kit includes the polished exhaust components, offering a straightforward upgrade for enthusiasts seeking enhanced auditory and visual appeal on their daily driver or performance-oriented vehicle.

Overview

Dinan Exhaust Systems

Fits 2019–2025 BMW X4 M40i

Part #: D660-0099

Overview

The Dinan Freeflow Axleback Exhaust System is a high-performance upgrade designed specifically for the BMW X4 M40i models from 2019 to 2025. Crafted to enhance both sound and weight savings, this exhaust system offers a refined yet aggressive auditory experience that appeals to driving enthusiasts seeking a balance of civility and excitement. Its straightforward design simplifies installation while delivering improved airflow and a signature low Dinan rumble. Whether you're cruising or pushing the throttle, this system supports a dynamic driving experience with a focus on durability and style.

Key Features

  • Constructed with polished stainless steel for durability and a sleek appearance
  • Eliminates the central collector/resonator for enhanced sound and reduced weight
  • Features a straight, unrestricted pipe pathway for maximum flow and performance
  • Equipped with Helmholtz resonator technology to reduce drone and unwanted frequencies
  • Retains factory valve functionality for adjustable sound levels
  • Supports full control over exhaust volume, from refined cruising to aggressive throttle
  • Designed for easy bolt-on installation with OEM fitment compatibility

Construction & Design

This exhaust system is built from high-quality polished stainless steel, ensuring long-lasting corrosion resistance and a premium finish. The design removes unnecessary components to streamline exhaust flow, resulting in weight savings and a cleaner, more aggressive look. The Helmholtz resonator integrated into the muffler helps manage sound frequencies, providing a balanced auditory profile that can be tailored with the factory valve system.

Sound & Driving Character

The Dinan Freeflow Axleback Exhaust system transforms your BMW X4 M40i’s sound profile, delivering a deep, low rumble that enhances the vehicle’s sporty character. When the factory valves are open, expect maximum volume and a forceful exhaust note that excites the senses. When closed, the system redirects gases through the muffler, producing a more subdued, refined tone suitable for everyday driving. This versatility allows you to enjoy a spirited driving experience without sacrificing comfort or civility.

Installation & Fitment

Designed for direct bolt-on installation, this exhaust system fits seamlessly onto the BMW X4 M40i models from 2019 to 2025. No additional modifications are required, making it an ideal upgrade for enthusiasts seeking improved sound and performance with minimal effort.

Ideal For

Enthusiasts looking to enhance their BMW X4 M40i’s sound profile, reduce weight, and improve exhaust flow, all while maintaining factory functionality and appearance. Perfect for those who want a customizable exhaust experience that balances daily comfort with spirited driving.
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