SKU: 87700664830

Borla 40997 - XR-1 Multicore Collector Muffler Shorty

Sale price$304.65 Regular price$338.50
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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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SKU: 87700664830

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Melissa Dudlets
Carnegie, US
★★★★★ 5
Good for wide or fat baby feet
Size: 18-24 Months Toddler, Color: Mariposa White Leather
Perfect fit for babies with wider chubbier feet easy for them to learn how to walk in with the leather soles also cute
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 24, 2026
N
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noah q.
Phoenix, US
★★★★★ 2
Way too big
Size: 6-9 Months Infant, Color: Mariposa White Leather
Adorable but sizing is WAY off. These are massive and look like toddler shoes on our (tall and bigger footed) 7 month old.
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Reviewed in the United States on March 21, 2026
J
Verified Purchase
Julia Tolstunova
Natrona Heights, US
★★★★★ 2
Cute but flimsy soles
Size: 9-12 Months Infant, Color: Mariposa Light Pink Leather, Size: 9-12 Months Infant, Color: Mariposa Light Pink Leather
I wanted to love these because they're the few leather options out there. Unfortunately, the soles are made of a flimsy material that came apart after less than 2 weeks of wear. Not sure how long they'll last...
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Reviewed in the United States on June 21, 2025
S
Verified Purchase
Sherryberry
Belleville, US
★★★★★ 5
Fits like a sock
We bought these for the Florida beaches, not knowing whether our beach would have debris, shells, or the common straw sticking up to assault your feet! We bought them for our one year old and she loved them. The sole is thin and moveable, but still protected her feet. Our beach ended up being pristine and clean, so she didn’t really need them. We let her wear them at home in the grass because she was that obsessed with them. Nice product and we’d buy them again, if needed!
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Reviewed in the United States on January 9, 2023
S
Verified Purchase
Sarah
Charlottesville, US
★★★★★ 5
Favorite Robezz shoe style
These are great, flexible sole that is a step up from the leather soles. This is a rubber gripper sole that protects the foot but gives great moment for new walkers! The fabric was better in person than I expected.
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Reviewed in the United States on May 7, 2026

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