SKU: 85500029987

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

Sale price$645.75 Regular price$717.50
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Description

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

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&trade: 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 T-304 Stainless Steel Tips with a polished finish. 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.

Best of all, it comes with BORLA's Million-Mile warranty.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • 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: 85500029987

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4.2 ★★★★★
Based on 10 reviews
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Verified Purchase
Jonathan B
Dallas, US
★★★★★ 3
Good mop, bad avoidance
Size: C20 renewed, Size: C20 renewed
I have mixed feelings about this product: The good – It does in fact clean very well. The mop picks up dirt effectively and the vacuum works very well. It was also surprisingly good at swapping from carpet to wood. I have a high door mat and it ran right over that. It was also good at mapping rooms and positioning, the floor map and restricted areas worked nicely. App also works well. The bad – Obstacle avoidance, it has none. It will run into everything over and over. If the item is too light (shoes, mic items, etc), it will run up on top of them or push them. It will also get stuck if it runs over something. Cords have no chance. The lidar does not work for anything except a wall, and even there it was unable to deal with short trim (1” trim was too low for the lidar and it kept running into the trim). I was having to run around and ensure there was nothing on the floor for it to work effectively. It also had a lot of trouble with my dining table, it would spend 20 min bumping up against it trying to get everywhere. Overall – this is a great robot mop if your floors don’t have any items on them (or you can restrict any loose items to one area and make it a no-go zone). If that is true then this is a great mop for the price and I would recommend. In practice for me it turned out to be quite annoying due to its limited obstacle avoidance and was almost more of a pain then just using a Swiffer. Note – I had to return because it was making a scraping noise (refurbished version), that is not reflecting in my rating. Though I am also not re-buying due to these issues.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 11, 2025
M
Verified Purchase
Mónica Caicedo
Grantham, US
★★★★★ 5
neat
Size: C20 renewed
very nice product
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Reviewed in the United States on May 11, 2026
S
Verified Purchase
Samantha mann
Port Orchard, US
★★★★★ 5
You do have to replace some of the moving parts
Size: C20 renewed
I love this for the price. I run it every single day, and it keeps mine floor, clean and free of hair and crumbs. I was skeptical, but pleasantly surprised. I even recommended this one to my sister. It’s nice not having to come home and sweep or vacuum the floor every single day because of the Pet hair.
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Reviewed in the United States on February 12, 2026
C
Verified Purchase
cecilia pena
Chelsea, US
★★★★★ 5
Perfect Replacement Roller Mop for Eufy Robot Vacuum
This replacement roller mop fits perfectly and works just like the original. Installation was quick and easy, and the quality feels durable and well-made. It does an excellent job picking up dust and light debris while providing consistent floor cleaning performance. The roller is washable, easy to maintain, and holds up well after multiple cleaning cycles. I appreciate that it restores the robot’s cleaning effectiveness without any compatibility issues. If you own a compatible Eufy model and need a replacement, this is a reliable option that keeps your robot performing at its best. Highly recommended for maintaining optimal cleaning results.
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Reviewed in the United States on May 30, 2026
G
Verified Purchase
Grandma of 5
New York, US
★★★★★ 5
Fit perfectly
Fit perfectly!
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Reviewed in the United States on March 12, 2026

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