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A studio product shot on a white background showing the complete Dinan Valved Cat-Back Exhaust System for the BMW X3 M40i. The system is laid out to show the brushed T304 stainless steel construction, featuring a large single mid-pipe that connects to a rear muffler with quad exhaust tips. }
A close-up view of the rear section of the Dinan exhaust system, highlighting the M-inspired quad 3.75-inch double-walled tips. The tips feature a black ceramic-coated finish with laser-engraved Dinan logos. }
The image showcases the mid pipe of the Dinan Valved Cat-Back Exhaust for the BMW X3 M40i and X4 M40i on a white background. }
A studio shot of the complete Dinan Valved Cat-Back Exhaust System for the BMW X3 M40i and X4 M40i. The high-quality brushed T304 stainless steel assembly is displayed on a white background. }
A studio product shot on a white background showing the complete Dinan Valved Cat-Back Exhaust System for the BMW X3 M40i. The system is laid out to show the brushed T304 stainless steel construction, featuring a large single mid-pipe that connects to a rear muffler with quad black ceramic coated exhaust tips. }
A detailed close-up of the four 4-inch exhaust tips for the Dinan X3 M40i exhaust. The tips feature a stealthy matte black ceramic-coated finish, a double-walled design, and the Dinan logo laser-engraved on the top of each tip. }
A studio product shot on a white background showing the complete Dinan Valved Cat-Back Exhaust System for the BMW X3 M40i. The system is laid out to show the brushed T304 stainless steel construction, featuring a large single mid-pipe that connects to a rear muffler with quad exhaust tips.
A close-up view of the rear section of the Dinan exhaust system, highlighting the M-inspired quad 3.75-inch double-walled tips. The tips feature a black ceramic-coated finish with laser-engraved Dinan logos.
The image showcases the mid pipe of the Dinan Valved Cat-Back Exhaust for the BMW X3 M40i and X4 M40i on a white background.
A studio shot of the complete Dinan Valved Cat-Back Exhaust System for the BMW X3 M40i and X4 M40i. The high-quality brushed T304 stainless steel assembly is displayed on a white background.
A studio product shot on a white background showing the complete Dinan Valved Cat-Back Exhaust System for the BMW X3 M40i. The system is laid out to show the brushed T304 stainless steel construction, featuring a large single mid-pipe that connects to a rear muffler with quad black ceramic coated exhaust tips.
A detailed close-up of the four 4-inch exhaust tips for the Dinan X3 M40i exhaust. The tips feature a stealthy matte black ceramic-coated finish, a double-walled design, and the Dinan logo laser-engraved on the top of each tip.

Dinan Valved Cat-Back Exhaust System for BMW X3 M40i / X4 M40i 2018-2024

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Brand: DinanSKU / Part #: D660-0099
$1,949.95
$1,949.95
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Dinan Valved Cat-Back Exhaust System for BMW X3 M40i / X4 M40i 2018-2024
Subtotal: $1,949.95
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Overview

Dinan Valved Cat-Back Exhaust System for BMW X3 M40i / X4 M40i 2018-2024

Transform the driving experience of your BMW X3 M40i or X4 M40i with the Dinan Valved Cat-Back Exhaust System. Designed for the discerning enthusiast, it delivers a richer, more aggressive exhaust note while maintaining the versatility of factory valve control—allowing you to switch between a refined cruise and an exhilarating roar. Crafted from premium T304 stainless steel and featuring an authentic quad-tip design, this direct bolt-on system not only enhances sound and performance but also adds striking visual appeal to your vehicle’s rear profile.

Key Features:

  • Dynamic Valved Sound: Retains factory valve functionality—enjoy a quiet, civilized tone when closed and an open, aggressive roar when you want full auditory excitement.

  • Authentic Quad-Tip Design: Equipped with four individual 3.75-inch polished or black ceramic tips for a bold, M-inspired aesthetic, without using faux "Y" outlets.

  • Direct Bolt-On Installation: Requires no cutting or welding. Uses factory mounting points for a straightforward fit on both pre-LCI and LCI models.

  • Superior Build Quality: Fully constructed from TIG-welded 100% T304 stainless steel for durability and corrosion resistance.

  • Enhanced Performance & Flow: Features larger 83mm diameter piping and removes the central resonator for increased exhaust flow, contributing to gains of +6 HP and +5 lb-ft torque.

  • Drone-Free Comfort: Incorporates Helmholtz resonance technology to eliminate unwanted cabin drone while cruising.

  • Weight Reduction: Saves approximately 7 pounds over the stock exhaust system.

  • Factory Fit & Compatibility: Includes all necessary hardware for seamless integration and a perfect fit.

Fitment Chart:

Make Model Year
BMW
 X3 M40i
 2018-2024
BMW X4 M40i 2019-2024

 

 


Fitment
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Shipping: Orders ship via UPS, FedEx or USPS, from our facility near Los Angeles or directly from the manufacturer. Rates for many items are weight-based and shown at checkout. If you need it by a certain date, text us before you order.

Returns: Unused items in brand-new condition and original packaging can be returned within 30 days of the invoice date, with a 25% restocking fee unless otherwise specified. In some cases we can offer a lower fee with the balance as store credit. Shipping charges aren't refundable in either direction unless approved by AutoTalent.

Not returnable: special-order or custom items, and anything that has been installed, modified or altered.

Cancellations: free if the item is out of stock or we miss the ETA you agreed to. Other cancellations carry a 5% processing fee to cover card fees we can't recover. Special-order items can't be cancelled.

Damaged in transit? Report it to the carrier and to us within 48 hours, keep all packaging, and don't send anything back without our written approval.

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