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Description
Borla 400487 - ProXS? Muffler Notched NeckSingle inlet and dual outlet. Notched necks for easy clamp on installation. Reversible design for installation flexibility. This muffler is generally used in a system that has a single inlet and dual outlets, but it can also be installed in a system with dual inlets and a single outlet. High quality T 304 austenitic stainless steel will never rust. 100% welded construction for strength. Free Flow design for improved performance. High temperature
Single inlet and dual outlet. Notched necks for easy clamp-on installation. Reversible design for installation flexibility. This muffler is generally used in a system that has a single inlet and dual outlets, but it can also be installed in a system with dual inlets and a single outlet. 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. Best of all, it's made in the USA and backed by Borla's Million-Mile warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.
Specifications:
| Description_ASM | ProXS? Muffler 3" Center Inlet/ 2.5" Dual Outlet, 4" x 9.5" Oval, 19" Long Body, 24" Overall Length. Universal Part. Reversible Design. Notched Necks. |
| Description_DEF | Exhaust Muffler |
| Description_DES | ProXS? Muffler - Notched Neck |
| Description_EXT | ProXS? Muffler 3" Center Inlet/ 2.5" Dual Outlet, 4" x 9.5" Oval, 19" Long Body, 24" Overall Length. Universal Part. Reversible Design. NOTched Necks. |
| Description_INV | BorlaProXS Muffler |
| Description_MKT | Single inlet and dual outlet. Notched necks for easy clamp-on installation. Reversible design for installation flexibility. This muffler is generally used in a system that has a single inlet and dual outlets, but it can also be installed in a system with dual inlets and a single outlet. 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. Best of all, it's made in the USA and backed by Borla's Million-Mile warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand. |
| Description_SHO | ProXS? Muffler |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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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
4.2 ★★★★★
Based on 11 reviews
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Product Reviews
★★★★★ 5
Great fit
Size: 3T, Color: Light Grey Heather
Very soft and great material. Stretchier than expected. Fit was great
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Reviewed in the United States on May 2, 2026
★★★★★ 3
Size up
Size: Small, Color: Black
Overall a good hoodie. Thin-ish to medium weight, but don’t expect heavy weight. It’s soft but of course since it’s on more on the thin side it loses its softness quick but for the price it’s good. It’s good to cricut heat transfer on.
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Reviewed in the United States on January 19, 2026
★★★★★ 5
Nice and heavy
Size: Small, Color: Dark Green
Nice quality, heavyweight. My child wears this all the time, it’s really nice.
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Reviewed in the United States on May 24, 2026
★★★★★ 1
Size is wayyyyy off
Size: X-Large, Color: Black
Super small ain’t no way this is an X-Large
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Reviewed in the United States on May 7, 2026
★★★★★ 5
Great shirt for the price.
Material Type: Recycled Polyester, Color: Electric Blue, Size: Large
Bought this for my son. Very nice shirt for the price, it is true to size and the color is the same as the picture. Would definitely buy it again. The material is good quality. No issues whatsoever
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Reviewed in the United States on May 19, 2026