SKU: 77189303718

Borla 40703 - XR-1 Multicore Collector Muffler Standard

Sale price$324.90 Regular price$361.00
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Description

Borla 40703 - XR-1 Multicore Collector Muffler StandardThis 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 a patented, award and race winning multicore high flow design just like the standard XR-1(r) muffler for maximum power. This muffler is recommended for Dragsters, Altereds, and Roadsters. 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_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 a patented, award and race winning multicore high flow design just like the standard XR-1(r) muffler for maximum power. This muffler is recommended for Dragsters, Altereds, and Roadsters. 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
Description_ASM XR-1(r) Multicore Collector Racing Muffler - (4) 2.375" Inlets (1) 4.5" Outlet 6.75" Round x 18" Long Body 20" Overall Length. Universal Part.
Description_DEF Exhaust Muffler
Description_DES XR-1 Multicore Collector Muffler Standard
Description_EXT XR-1 Multi-Core Collector Racing Muffler - 2.375" Inlets (4)/ 4.5" Outlet 6.75" Round x 18" Long Body 20" Overall Length. Universal Part.
Description_INV Borla(r) XR-1 Collector Muffler


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Exchange/Return Notes
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SKU: 77189303718

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Carnegie, US
★★★★★ 5
Good size for everyday use.
Comfy size. You can put your tablet in with ease, has plenty of pocket space for accessories. Fabric is water resistant. The appearance is exactly how it shows as advertised. Good quality which is worth the money. I use it for my Pixel 11 tablet.
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Reviewed in the United States on April 30, 2026
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Lake Worth, US
★★★★★ 5
Cute, functional, and well-made
I've had this for a while, and would actually like a larger one too for my laptop. This is very well made, with durable fabric, strong zippers and great padding. I can easily fit my Galaxy Tab S9 in its protective case in the padded section inside, my old Kindle Oasis with cover in the zipper sleeve outside, my Galaxy S23 Ultra, also in its case in the slim magnetic pocket outside. It also holds my charging cords, adapter and earbuds in the case. It fits a lot and is not bulky and easily slips into a tote. I'm glad I picked this up, and when it's not moving around, it's useful just for storing cords and accessories.
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Reviewed in the United States on December 11, 2024
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Ga***e
San Leandro, US
★★★★★ 5
Looks sturdy and well-made - waiting to use
Not using this yet, but from examining it, this laptop sleeve appears sturdy and durable. The padded protection looks solid for keeping a MacBook safe. The design is versatile - works as a carrying case or travel bag. The handle is convenient, and it's lightweight despite the protective padding. Based on build quality and appearance, this looks like a reliable laptop sleeve. Highly recommend for MacBook owners!
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Reviewed in the United States on May 31, 2026
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Nick M.
New York, US
★★★★★ 5
Fits 11” iPad Air with keyboard case
Was looking for something that could hold not just my 11” iPad Air, but also hold it while in its keyboard case with flash sticks and storage for plugs and such. This fits everything perfectly, has good padding, storage pockets inside and out, and feels like a quality build.
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Reviewed in the United States on December 21, 2025
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Lynn Garcia
Los Angeles, US
★★★★★ 5
Perfect!
Love it! Fits all my chargers/wires as well. I have a 14" Mac Book Pro and it fits perfectly.
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Reviewed in the United States on March 8, 2026

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