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Diamond Eye Manufacturing 360040 4" Stainless Steel Quiet Tone Turbo Downpipe

(2001-2007 Chevrolet Silverado 2500 HD; 2001-2007 Chevrolet Silverado 3500; 2002-2007 GMC Sierra 2500 HD; 2007 GMC Sierra 3500 HD SLE/SLT/WT + 1 more model)

Manufacturer

Picture for manufacturer Diamond Eye Manufacturing

Part Number

360040
11 reviews
Sale Price

$323.50

Estimated ship date Sunday, December 20

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Diamond Eye Manufacturing 360040 is a high-performance turbo downpipe engineered to maximize exhaust flow and improve overall engine performance. Constructed from durable T409 stainless steel, this downpipe features precision mandrel bends that maintain a consistent 4-inch diameter throughout, eliminating restrictive crimps and ensuring optimal exhaust gas flow from the turbocharger.

Key Features:

  • T409 stainless steel construction for long-lasting durability and corrosion resistance
  • 4-inch inlet and outlet diameter for maximum flow capacity
  • Quiet Tone design reduces excessive noise while maintaining performance
  • Precision CNC mandrel-bent tubing eliminates flow restrictions
  • Direct bolt-on replacement design for simplified installation
  • Manufactured in Athena, Oregon with high-quality materials and craftsmanship

By replacing the restrictive factory downpipe with this free-flowing Diamond Eye unit, you can expect reduced exhaust gas temperatures (EGTs), improved throttle response, increased horsepower and torque, and enhanced fuel economy. The Quiet Tone configuration provides a deeper, more aggressive exhaust note without excessive drone or harshness, making it ideal for daily driven diesel trucks.

Products specifications

Fits

2001-2007 Chevrolet Silverado 2500 HD; 2001-2007 Chevrolet Silverado 3500; 2002-2007 GMC Sierra 2500 HD; 2007 GMC Sierra 3500 HD SLE/SLT/WT; 2002-2007 GMC Sierra 3500

Catalytic Converter Included

No

Inlet Diameter (in)

4.000 in.

Inlet Diameter (mm)

101.60mm

Mandrel-Bent

Yes

Notes

Quiet tone downpipe.

Outlet Diameter (in)

4.000 in.

Outlet Diameter (mm)

101.60mm

Oxygen Sensor Bung Included

No

Quantity

Sold individually.

Tubing Finish

Natural

Tubing Material

Stainless steel

Had what I need when I needed it. Thanks

Fast & easy

Great linkage t Amazon checkout

La compra que hice fue muy rápida y sin complicaciones

price is great....could use more detailed description of the parts

Quick and easy ordering. Thanks.

Great Price, shipped 2 days later though.

good so far

Not sure yet can reply later

Great customer service. Good price. Quick shipment. Would definately reccomend this company.

I was a bit concerned buying from a online retailer I had not done business with before, but Autoplicity is now on my list of preferred vendors. I was sure there would be some problem, as the part I ordered was $73 cheaper than anywhere else online (too good to be true). Well, the part arrived super fast, and was exactly as I ordered. I did not hear from them immediately after ordering, but received confirmation and tracking info when the item shipped, which was two days after ordering. All in all, a great, money saving experience.<br><br>Update:<br>While I am still pleased with the service I received, I find it odd that Autoplicity emailed me and offered me a refund of $5 for writing a review. It has been a couple of weeks since I posted my review, and I have yet to see any credits on my credit card.

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