SKU: 11157982398

Borla 40665 - Pro XS Muffler Un-Notched Neck

Sale price$152.10 Regular price$169.00
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Ships within 48 hours · Estimated delivery Jul 12 - Jul 17

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Description

Borla 40665 - Pro XS Muffler Un-Notched NeckProduct Description Reversible design for installation flexibility. High quality T 304 austenitic stainless steel will never rust. 100% welded construction for strength. Free Flow design for improved performance. High temperature continuous filament fiber (CFF) acoustic material for sound control. Natural mill finish can be brushed or polished prior to installation. Exhaust Muffler; Pro XS Series; T 304 Stainless Steel; 9 1 2 Inch Width X 4 Inch

Product Description

Reversible design for installation flexibility. High-quality T-304 austenitic stainless steel will never rust. 100% welded construction for strength. Free Flow design for improved performance. High-temperature continuous-filament fiber (CFF) acoustic material for sound control. Natural mill finish can be brushed or polished prior to installation.

Exhaust Muffler; Pro XS Series; T-304 Stainless Steel; 9-1/2 Inch Width X 4 Inch Height Case; Single 2-1/2 Inch Center Inlet; Single 2-1/2 Inch Offset Outlet; 19 Inch Body/24 Overall Length

Features & Benefits

  • BORLA(R) ProXS™ Mufflers Are Designed For Supreme Street Performance
  • Offering Aircraft Quality High Quality T-304 Stainless Steel, All Welded Construction And More For Increased Horsepower And Torque
  • Independent Tests Prove Maximum Flow Capability
  • All BORLA® Mufflers Are Manufactured Using Ultra Durable, Continuous Strand Sound Absorbing Composite Filament
  • Built From High-Quality T-304 Stainless Steel, Will Not Rust
  • Flared Collectors On Both Ends Increase The Internal Diameter Of The Muffler Allowing For Optimal Flow
  • Limited Million Mile Warranty

Attributes

  • Shape: Oval
  • Inlet Position: Center Single
  • Inlet Diameter (IN): 2-1/2 Inch
  • Outlet Position: Offset Single
  • Outlet Diameter (IN): 2-1/2 Inch
  • Case Diameter (IN): 9-1/2 Inch X 4 Inch
  • Case Length (IN): 19 Inch
  • Overall Length (IN): 24 Inch
  • Includes Tip: No
  • Universality: Fully Universal
  • Tip Finish: No Tip
  • Estimated Install Time (Hours): 1
  • Color/ Finish: Bare
  • Material: Stainless Steel
  • Wall Type: Single Wall
  • Internal Construction: Straight Through Single Core
  • Tip Length (IN): No Tip
  • Tip Diameter (IN): No Tip
  • Tip Material: No Tip

Installation Instructions

Warranties


Specifications:

Description_ASM ProXS? Muffler 2.5" Offset Inlet/ 2.5" Center Outlet, 4" x 9.5" Oval, 19" Long Body, 24" Overall Length. Universal Part. Reversible Design.
Description_DEF Exhaust Muffler
Description_DES ProXS? Muffler - Un-Notched Neck
Description_EXT ProXS? Muffler 2.5" Offset Inlet/ 2.5" Center Outlet, 4" x 9.5" Oval, 19" Long Body, 24" Overall Length. Universal Part. Reversible Design.
Description_INV BorlaProXS Muffler
Description_MKT Reversible design for installation flexibility. High-quality T-304 austenitic stainless steel will never rust. 100% welded construction for strength. Free Flow design for improved performance. High-temperature continuous-filament fiber (CFF) acoustic material for sound control. Natural mill finish can be brushed or polished prior to installation.
Description_SHO ProXS?


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 11157982398

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Amazon Customer
Natrona Heights, US
★★★★★ 5
Size was right on
Color: Black, Size: XX-Large, Color: Black, Size: XX-Large
This is my new stage shirt. I got so many compliments of the look and feel.
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Reviewed in the United States on May 18, 2026
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Amazon Customer
Charlottesville, US
★★★★★ 5
Color is excellent
Color: Dark Green, Size: X-Large
The fit overall is good. The arms are a little big but fits well everywhere else. Love the color.
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Reviewed in the United States on April 4, 2026
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Rowan
Belleville, US
★★★★★ 4
Solid Basic Dress Shirt With a Slightly Small Fit
Color: Grey, Size: XX-Large
This shirt is pretty decent overall for the price. The material is on the thinner side, but thankfully it doesn’t have that overly shiny look that a lot of cheaper dress shirts tend to have. It still looks fairly clean and presentable, and it works well for business casual wear or occasions where you just need a simple button-down that looks put together. Fit-wise, I’d say it runs slightly small. It’s not dramatically off, but if you’re between sizes or prefer a little extra room, sizing up might be a good idea. Other than that, it’s a solid basic shirt that gets the job done without looking cheap.
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Reviewed in the United States on May 28, 2026
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FLP
Bozeman, US
★★★★★ 5
Order a size up
Color: Black, Size: X-Large
Whatever their size chart says order a size up and it will fit perfect. The size chat suggests a large for me. I read some reviews and ordered extra large and it fits perfect.
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Reviewed in the United States on May 1, 2026
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Danny De La Pena
Omaha, US
★★★★★ 5
Great customer service
Color: Brown, Size: XX-Large
Your shirts fit great!
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Reviewed in the United States on May 17, 2026

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