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Dinan D660-3940 Free Flow Axle-Back Exhaust System for BMW 540i E39

(1997-2003 BMW 540i; 1986-1989 Buick Skylark Custom/Limited)

Part of: Dinan Free Flow Axle-Back Exhaust System

Other options in this family: Dinan D660-4602 Dinan D660-0050-BLK Dinan D660-0046-BLK Dinan D660-0086-BLK Dinan D660-3950

Manufacturer

Picture for manufacturer Dinan

Part Number

D660-3940
13 reviews
Sale Price

$967.95

1 left at this price

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Dinan Free Flow Axle-Back Exhaust transforms your 1997-2003 BMW 540i with enhanced performance and an aggressive exhaust note. Engineered specifically for the E39 chassis, this premium exhaust system delivers measurable power gains while reducing weight and improving sound quality.

Performance Benefits:

  • Power increase of 7 HP at 6500 RPM and 6 lb-ft of torque at 6500 RPM when paired with Dinan software
  • Over 15 lbs lighter than the factory exhaust system (18.5 lbs vs 34 lbs stock)
  • Improved exhaust flow reduces backpressure for better engine breathing

Construction and Design:

  • 100% 304 stainless steel construction for superior corrosion resistance and durability
  • Dual 3-inch polished exhaust tips with laser-engraved Dinan branding
  • Proprietary drone abatement technology minimizes cabin resonance during cruising
  • Utilizes factory mounting brackets and hangers for OEM-quality fitment
  • Direct bolt-on installation with no modifications required

This axle-back system delivers an enjoyably louder and sportier exhaust tone without excessive drone, making it ideal for both street driving and spirited performance. The polished stainless tips add a premium aesthetic touch while the lightweight design improves overall vehicle dynamics.

Products specifications

Fits

1997-2003 BMW 540i; 1986-1989 Buick Skylark Custom/Limited

Brand

Dinan

Material

304S Stainless Steel

Prop 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Exhaust Type

Axle-Back

Tip Diameter

3.000 in.

Category

Exhaust

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

Sub Category

Exhaust and Tail Pipes

Warning

California Proposition 65

Weight

37.5

Width

30

Very pleased with my purchase and Autoplicity. Got the best price on the internet and received it very quickly. Product arrived just as discribed. I highly recommend Autoplicity for your on-line shopping needs.

Autoplicity did a good job getting my order to me fast. Product looks like it is in good condition.

Looking forward to testing your prudent.

Pre drilled holes for the bolts to go in would be nice to have

easy shopping, I have my truck in the shop and waiting for the part

I was extremely pleased. The order arrived right away - before I expected it. I will buy from them again.

Found my fender flares easy made payment and shipped right away received my product in 2 days gr8 seller will do business again

most competitive price i've been able to find for the ebc redstuff. with the shipping price it is still hard to argue against such prices, along with a guild letting me know these brakes will fit on my car. +1

great experience

Very easy system!! Thanks!!

Nice to have shopping payment options with great prices

Product was cheapest I could find and shipping was super fast. Not sure how you could go wrong with them.

i was skeptical about this site but after reading the reviews and them having the lowest price i could find for my part i pulled the trigger and wasn't disappointed. fast shipping and low prices with great customer service will shop with them again if they have what im looking for.

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