SKU: 68441289253

Borla Cat-Back Exhaust System - S-Type (140803CB)

Sale price$670.50 Regular price$745.00
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Description

Borla Cat-Back Exhaust System - S-Type (140803CB)Borla S Type Cat Back Exhaust System for 2017 2020 Honda Civic Si 1. 5L 4 Cyl. Turbo Manual Transmission Front Wheel Drive 4 Door. (140803CB) Upgrading your factory exhaust system to a Borla stainless steel performance exhaust system with a more efficient and less restrictive design can improve sound (adding more enjoyment driving your vehicle) and increase engine horsepower and torque throughout the RPM range (allowing quicker acceleration to pass a

Borla S-Type Cat-Back Exhaust System for 2017-2020 Honda Civic Si 1.5L 4 Cyl. Turbo Manual Transmission Front Wheel Drive 4 Door. (140803CB)

Upgrading your factory exhaust system to a Borla stainless steel performance exhaust system with a more efficient and less restrictive design can improve sound (adding more enjoyment driving your vehicle) and increase engine horsepower and torque throughout the RPM range (allowing quicker acceleration to pass a vehicle or get to highway speeds quicker). Borla offers Axle Back exhaust systems, Cat back exhaust systems, and for select Competition-Use-Only vehicles, we offer long tube headers to replace your exhaust manifold for the best performance and sound.

The Borla "Cat Back" name implies the exhaust system is located behind the factory catalytic converter where there factory emissions remain untouched and vehicle stays emissions compliant. This remains distinct from the Axle Back exhaust system that is located behind the rear axle. Alex Borla coined the phrase 'Cat Back' and introduced the Cat Back performance exhaust in 1978, a bolt-on replacement performance exhaust system requiring no welding, thus being secured using the factory hanger locations.

Borla Cat Back exhaust systems use engine-specific (not universal) mufflers that are designed, tested, and optimized specifically for a particular year/make/model vehicle. Borla Cat Back systems increase the overall sound level & performance. Vehicles that don't have a factory service-point require "cutting" the factory exhaust system before installing a Borla Cat Back performance exhaust system. Borla includes instructions where to make this cut and includes the hardware to complete the installation. Many of today's modern vehicles have a factory service-point in the exhaust system (flange or slip-fit) located in the exhaust tubing behind the catalytic converter. A Borla Cat Back performance exhaust system replaces the factory exhaust system (behind this service-point) following the same exhaust path and secured using the original vehicle hangars and rubber isolators. Borla pioneered the automotive exhaust aftermarket in exhausts constructed in aircraft grade 304 stainless steel tubing, a material with higher content of carbon & nickel that won't rust or corrode.

Features:

  • Horsepower and Torque Increased by 7 10%
  • Increased exhaust flow for better performance
  • Better fuel economy at cruising speeds
  • The most aggressive sound of any Borla system
  • Custom designed for each application
  • Patented straight-through, multi-core muffler design reduces backpressure while absorbing sound waves
  • Mandrel-bent stainless steel tubes with diameters optimized for reduced restriction while maintaining exhaust gas speed
  • Made from the finest austenitic stainless steel for long-lasting durability
  • All welded construction
  • Includes everything required for installation, including detailed instructions
  • Backed by the exclusive Borla Million-Mile warranty
  • Proudly made in the USA more

The BORLA Cat-Back is the perfect addition to the tenth generation Honda Civic Si. Our Cat-Back systems for the Honda Civic Si are specifically tuned for the car's 1.5L Turbo engine and are designed for easy, bolt-on installation. Our S-Type sound level delivers a sound that is much sportier than the barely audible factory exhaust. This particular system has been designed to fit the Civic Si Sedan and features dual 4.25" Intercooled Tips with a durable, high-temperature ceramic black finish on T-304 stainless steel. To top it off, our systems are drone-free and made with premium, high-quality T-304 austenitic stainless steel to give you unmatched durability.

You can count on BORLA to provide durability, performance, sound, and a Million Mile Warranty. See separate note about warranty on tip finish.

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
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
SKU: 68441289253

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Stephanie
Omaha, US
★★★★★ 5
Sound deadening the Hot Rod
Size: 20 sqft, Size: 20 sqft
Works well, good value for the money. It’s very sticky and conforms to what you are applying it to. One 20 sq ft box did approximately the passenger side
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Reviewed in the United States on April 3, 2026
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M. Del
Grantham, US
★★★★★ 5
Good stuff
Size: 50 sqft, Size: 50 sqft
Good stuff. I did a lot of work on my 91 Toyota Land Cruiser 3FE. I did the inside and outside doors, as well as the under-hood area, with some extra work. I like this stuff. It sticks down good but you have to clean your surface so there's a good grip. I think these are going to do well for noise cancellation. The deadening material does well with absorbing vibrations too. But the install roller tools it will come in handy. Trust me trying to do it by hand is not worth it.
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Reviewed in the United States on June 6, 2026
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Charlie J
Lexington, US
★★★★★ 4
Good quality
Size: 10 sqft
I wish it was a little better but it definitely works great and look good for how cheap it is
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Reviewed in the United States on January 23, 2026
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R. Selberg
Phoenix, US
★★★★★ 5
Works well
Size: 10 sqft
Worked great at a budget price. I used it to damp a fiberglass loudspeaker horn. Easy to work with too.
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Reviewed in the United States on May 8, 2026
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Devan
Lexington, US
★★★★★ 5
Good material but bites back
Size: 20 sqft
Very good product for my rear trunk and backseat on my mustang. I would recommend some type of gloves due to the foil itself when placing down will cut up your hands and fingers. Overall good product for its price.
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Reviewed in the United States on May 23, 2026

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