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


Shipping Notes
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Exchange/Return Notes
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SKU: 77189303718

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Wendy Quiram
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★★★★★ 5
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Reviewed in the United States on April 4, 2026
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Kindle Customer
Natrona Heights, US
★★★★★ 5
Would buy again.
Size: 0.15 Ounce (Pack of 1)
Love the COOLA products. This lipscreen is great - glides on, not too thick, very smooth and feels good on your lips. And, my lips stayed burn free in the hot tropic sun. Would buy again!
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Reviewed in the United States on May 14, 2026
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Summer DiFraia
Battle Creek, US
★★★★★ 5
Just get it
Size: 0.15 Ounce (Pack of 1)
A bit pricy but worth it. I hate sunscreen lip products. They taste terrible and are greasy. Unlike others this does not taste bad, goes on smooth, and has great sun protection. Great for vacation or anytime you’re outdoors.
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Reviewed in the United States on May 9, 2026
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Nancy
Cuba, US
★★★★★ 4
Excellent protection, easy application, meh flavor
Size: 0.15 Ounce (Pack of 1)
I would give this a 5 star for sun protection as I wore it for hours in full sun and in the water and did not get my usual lip soreness. It goes on easy but leaves an odd aftertaste which doesn't last long. I'd buy this again.
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Reviewed in the United States on March 1, 2026
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Marie
Natrona Heights, US
★★★★★ 5
Feels great on the lips, not sticky or greasy
Size: 0.15 Ounce (Pack of 1)
Great item! Feels super soft in the lips and not greasy! SPF 30 is great since my lips get sunburned easily. Will but again!
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Reviewed in the United States on May 24, 2026

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