Dinan Free Flow Axle-Back Exhaust System for BMW 540i (non M tech) 1997-2003
Special Note: Not applicable for cars equipped with M-Technic rear bumper.
The Dinan Free Flow Axle-Back Exhaust for the BMW 540i is designed to enhance performance while providing a refined sound profile, avoiding the excessive noise often associated with typical performance exhausts. This system emphasizes quality, durability, and an improved driving experience, making it an excellent upgrade for enthusiasts.
Key Features:
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Performance Gains:
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Power Increase:
- +7 HP @ 6500 RPM
- +6 LB-FT @ 6500 RPM (with software)
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Tuned Resonance Chamber Technology: This unique feature allows for an optimal balance between enhanced power output and a civilized, sporty exhaust note, making for a more enjoyable driving experience.
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Lightweight Construction: The Dinan exhaust system significantly reduces weight, weighing in at 18.5 lbs compared to the stock system's 34 lbs, resulting in a 15.5 lbs weight reduction.
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Durable Materials: Constructed from 20 gauge 304 stainless steel, the muffler cases offer superior corrosion resistance, ensuring longevity and performance.
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Aesthetic Appeal: Features dual 3-inch diameter polished stainless steel exhaust tips, which are laser engraved with the Dinan logo, providing a tasteful and sporty appearance.
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Drone Abatement Technologies: Engineered to minimize cabin resonance, this system helps maintain a comfortable interior sound level, particularly during low RPM driving.
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Factory-like Fitment: The exhaust utilizes factory brackets and hangers for easy installation, ensuring a perfect fit without the need for modifications.
| Brand |
Dinan |
| Dinan Point Value |
3 |
| Emission Code |
5 |
| Height |
11 |
| Labor Time (Hours) |
1.5 |
| Length |
48 |
| Max HP Gain |
7 @ 6500 RPM |
| Max Torque (lb-ft) Gain |
6 @ 6500 RPM |
| Product Type |
Axle-Back Exhaust |
| Weight |
37.5 |
| Width |
30 |
| UPC |
813725021867 |
| Part Number |
D660-3940 |
Fitment Chart:
| Make |
Model |
Year |
BMW
|
540i
|
1997-2003
|
⚠️ California Proposition 65 Warning:
This product may expose you to chemicals known to the State of California
to cause cancer or reproductive harm.
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We are committed to providing the best value. If you find a lower advertised price from a verified vendor, we will match it. Shop with confidence knowing you’re getting the industry's lowest price.
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Project Incentives:
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We reward enthusiasts who trust us with their major projects. Use these tiered codes at checkout to apply instant savings to your order:
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• AH180 — $180 OFF $3000+ | • AH400 — $400 OFF $6000+
• AH630 — $630 OFF $9000+
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Fitment Guarantee:
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Avoid the headache of the wrong part. If you are unsure about compatibility, contact us first. If we verify the fitment for your vehicle via email and it doesn’t fit, we will handle the exchange at no cost to you.
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Flexible Returns:
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Unused items in brand-new, original packaging can be returned within 30 days. While standard refunds incur a 25% restocking fee, we will waive this fee entirely if you choose store credit or an exchange for your next upgrade.
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Exclusions:
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To ensure every customer receives brand-new, untampered components, parts that have been installed, modified, or used are non-returnable. Custom builds, special orders, and wheel/tire packages are considered final sale.
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Fitment Guarantee
Fitment guides and tools are helpful—but your car is unique! Some trims and options aren’t always listed, so if you want 100% confidence that a part will fit, our team is happy to double-check for you. We take the guesswork out of your purchase by standing behind our expertise.
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Verify Your Build:
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If this product doesn't list your specific vehicle data, simply reach out to support@autohousesupply.com. We will manually verify compatibility for you.
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Our Promise:
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When we confirm a fitment in writing and it doesn’t work for your application, we cover the return shipping and exchange it at no cost to you.
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