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- USA
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Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
For Your Every Summer RSVP, with Code: SUMMER15
Description
Borla 40997 - XR-1 Multicore Collector Muffler ShortyThis is the HOT set up in drag racing. This patented, award and race winning vacuum Wave Collector was designed to replace your current open header collector and serves as a power producing merge collector and muffler all in a single unit. The technology in this unit results in pulling air through the engine faster, which creates more power. When an exhaust valve opens, an energy wave is created from the expanding combustion gases. When this wave
This is the HOT set up in drag racing. This patented, award and race-winning vacuum Wave Collector was designed to replace your current open header collector and serves as a power producing merge collector and muffler -- all in a single unit. The technology in this unit results in pulling air through the engine faster, which creates more power. When an exhaust valve opens, an energy wave is created from the expanding combustion gases. When this wave encounters a lower pressure area such as a larger collector pipe or the atmosphere, a reversion wave is reflected back toward the exhaust valve. Borla's Vacuum Wave Collector Muffler ensures this wave's "anti-node" reaches the exhaust valve at the precise time for its lower pressure to help fill the combustion chamber with a fresh charge and to further extract spent gases from the chamber via a vacuum effect. Made with the same patented, award and race winning flow through design as the Standard XR-1(r) Collector/Muffler. This muffler, however, is designed for door car applications where a Standard size Collector/Muffler is too large. This muffler is recommended for Full Chassied Cars. Accepted in NHRA, IHRA, Hot Rod Series, Brackets, Super Chevy, and NSCA. Recommend for high horsepower applications. T-304 Stainless steel will never rust. 100% welded construction for strength. T-304 stainless steel wool for sound control. Best of all, it's made in the USA. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.
Specifications:
| Description_ASM | XR-1(r) Multicore Shorty Collector Racing Muffler - (4) 2.125" Inlets (1) 3.5" Outlet 6.25" Round x 14" Long Body 16" Overall Length. Universal Part. |
| Description_DEF | Exhaust Muffler |
| Description_DES | XR-1 Multicore Collector Muffler Shorty |
| Description_EXT | XR-1 Multi-Core Shorty Collector Racing Muffler - 2.125" Inlets (4) 3.5" Outlet 6.25" Round x 14" Long Body 16" Overall Length. Universal Part. |
| Description_INV | Borla(r) XR-1 Collector Muffler |
| Description_MKT | This is the HOT set up in drag racing. This patented, award and race-winning vacuum Wave Collector was designed to replace your current open header collector and serves as a power producing merge collector and muffler -- all in a single unit. The technology in this unit results in pulling air through the engine faster, which creates more power. When an exhaust valve opens, an energy wave is created from the expanding combustion gases. When this wave encounters a lower pressure area such as a larger collector pipe or the atmosphere, a reversion wave is reflected back toward the exhaust valve. Borla's Vacuum Wave Collector Muffler ensures this wave's "anti-node" reaches the exhaust valve at the precise time for its lower pressure to help fill the combustion chamber with a fresh charge and to further extract spent gases from the chamber via a vacuum effect. Made with the same patented, award and race winning flow through design as the Standard XR-1(r) Collector/Muffler. This muffler, however, is designed for door car applications where a Standard size Collector/Muffler is too large. This muffler is recommended for Full Chassied Cars. Accepted in NHRA, IHRA, Hot Rod Series, Brackets, Super Chevy, and NSCA. Recommend for high horsepower applications. T-304 Stainless steel will never rust. 100% welded construction for strength. T-304 stainless steel wool for sound control. Best of all, it's made in the USA. Just what you'd expect from the world's most experienced (and most winning) exhaust brand. |
| Description_SHO | XR-1 Collector |
Shipping Notes
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4.1 ★★★★★
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Product Reviews
★★★★★ 5
Quality product
Great fit, son is 6'4"
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Reviewed in the United States on November 6, 2025
★★★★★ 5
A fantastic black tuxedo for men’s
Incredible gentleman’s suit with great fabric, modern design,and fits perfectly without any hiccups or looseness.
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Reviewed in the United States on May 24, 2025
★★★★★ 5
Stunning
Nicely done looks great on my husband
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Reviewed in the United States on August 3, 2025
★★★★★ 4
Prom
Suit was a little too big, so had to have it taken in, other than that, it is perfect
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Reviewed in the United States on October 20, 2025
★★★★★ 2
Small and Stiff, that’s what she said!
Refunded… this thing is cut small, has a short crotch area, like women’s pants and the material although nice is stiff with no give at all… gotta be a skinny dude to wear this one. I suggest a size or 2 up
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Reviewed in the United States on January 15, 2026