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Borla 400286 Proxs? Muffler - Un-Notched Neck



<p><span id="docs-internal-guid-4e7d01b8-7fff-21db-3699-af03f21a331b">Borla Performance Industries is the pioneer and leader in the design and manufacture of stainless steel performance exhaust since 1978. Your exhaust system is an extremely critical component of an efficient engine. The Borla exhaust systems we offer are made from high quality parts and components to ensure reliable performance and increased efficiency. You will get only the best with Borla.</span></p>

Part Number

06/15/2034 5:37 AM
Sale Price


In Stock (10+)

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Usually delivered within 2 days

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Live-in-stock inventory

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Fitment guaranteed

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Product Details

Borla 400286 Proxs? Muffler - Un-Notched Neck

BORLA Turbo XL Mufflers are designed for supreme street performance, offering aircraft-quality high quality austenitic stainless steel, all-welded construction and more for increased horsepower and torque. Independent tests prove maximum flow capability. Turbo XL models are recommended for larger engines. Turbo models for smaller motors up to small-block V8s.

  • Turbo XL 2.50 inch dual in/out 19 X 9.5 X 4 in
  • All-welded construction and more for increased horsepower and torque
  • Designed for supreme street performance

Prop65WARNING: Some Products may contain chemicals such as DEHP, which can cause cancer, birth defects or other reproductive harm. For more information, go to

Products specifications

Case Length (in)

19.000 in.

Case Shape


Inlet Diameter (in)

2.500 in.

Inlet Location


Inlet Quantity


Internal Construction


Muffler Finish


Muffler Material

Stainless steel

Outlet Diameter (in)

2.500 in.

Outlet Location


Outlet Quantity


Outlet Style

Standard, without tip

Overall Length (in)

24.000 in.


Sold individually.

Thickness (in)

4.000 in.

Width (in)

9.500 in.

Inlet Type

Dual Inlet

Body Height (in.)


Body Length (in.)


Body Width (in.)


Inlet Size (in.)


Outlet Size (in.)


Overall Length (in.)


Body Length

19.000 in.

Inlet Inside Diameter

2.500 in.

Overall Length

19.000 in.

Outlet Outside Diameter

2.500 in.

Body Width

9.500 in.

Prop 65 - Short Label

Proposition 65 Warning.JPG

Tip / Outlet Finish


Off Road Use Only



All Welded

Body Height

4.000 in.

Inlet Position


Inlet Type


Main Piping Diameter

2.500 in.

Outlet Type

Dual Outlet

Muffler Count


Inlet Connection Type


Inlet Outside Diameter

2.500 in.

Outlet Position


Title Extended

ProXS Muffler? 2.5" Dual/2.5" Dual 19"x4"x9.5" Part # 400286




T-304 Stainless Steel

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I was very surprised on how quick it got here.

Prompt delivery good price

Very Informative

Recieved 1/2 of my order, therefore it is incomplete, back ordered will deliver in January.


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Best price on the net! Haven't got my order yet, it just shipped so we will see from there.

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