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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:
- 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
4.1 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 1
Bad fit
Style: C20 Parts * 19pcs
The dust bags do not fit properly. You can get the base to acknowledge them if you place them just right, but any little movement can move them out of place. I have to constantly reseat them because the base thinks there is no bag. The stock bags do not have this problem.
Edit: It has gotten to the point where it is constantly flipping between registering and not registering the bag. Changing to 1 star because they are unusable. If I'm not there to fix it, the task fails every time.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 29, 2026
★★★★★ 5
Great product
Style: C20 Parts * 19pcs
Fits great
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 25, 2026
★★★★★ 3
Dust bags not compatible
Style: C20 Parts * 19pcs
Dust bags do not work. Not compatible as described, everything else works
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 1, 2026
★★★★★ 5
Kit de Respuestos
Style: C20 Parts * 19pcs
Excelente Kit de respuestos para para mi Robot de Limpieza, ya los instalé y súper bien , me gustaron mucho
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2026
★★★★★ 2
Not compatible with eufy Omni C20.
Style: C20 Parts * 19pcs
The filters are too small. To avoid dust laden air from just going around them I put pieces of paper around the edges as spacers. But they're also shorter too. No chance of a reasonable seal.
Then the vacuum bags are the wrong size too. The robot gives me an error message saying "no vacuum bag is detected". The mop still works, but no vacuum action.
I only bought this kit because the one I was using (that works) was temporarily unavailable.
Never again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026
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