This Borla S-Type Cat-Back system was designed specifically for the Acura Integra and Honda Civic Si. The 2.5 inch diameter system uses Borla's Polyphonic Harmonizer technology, which combines pipes of different diameters and lengths to create multiple exhaust notes that harmonize into a clean, rich, full-bodied performance tone backed by Borla's no-drone guarantee. It exits through single 4.5 inch round bright chrome on T-304 stainless steel tips on each tailpipe. Borla Cat-Back systems use patented straight-through, multi-core technology to free hidden horsepower and deliver the distinctive Borla Sound of Power. As a street cat-back system that mounts behind the factory catalytic converters, it is 50-state emissions legal. Like all Borla exhaust systems, it is handmade in the USA from premium T-304 austenitic stainless steel and backed by the Borla Million-Mile Warranty.
Specifications:
- System type: S-Type Cat-Back exhaust system
- Sound level: S-Type
- Material: T-304 stainless steel
- Pipe diameter: 2.5 in
- Muffler: Polyphonic Harmonizer technology
- Tips: Single 4.5 in round Bright Chrome per tailpipe
- Emissions: 50-state emissions legal
- Made in the USA
- Warranty: Million-Mile Warranty
- Part number: 140922
Vehicle Applications:
- 2023 Acura Integra A-Spec
- 2022 Honda Civic Si
- 2023 Honda Civic Si
FAQ
What vehicles does this Borla cat-back fit?
This system fits the 2023 Acura Integra A-Spec and 2022-2023 Honda Civic Si with the 1.5L turbocharged engine (manual, FWD).
Is this Borla cat-back legal for street use?
Yes. Borla street cat-back systems mount behind the factory catalytic converters and are 50-state emissions legal, so they are street legal in all 50 states including California.
What does the Polyphonic Harmonizer do?
It uses patented chambers with pipes of varying diameters and lengths to create multiple exhaust notes that harmonize into a clean, full-bodied tone, which the muffler then shapes to the system's performance sound with Borla's no-drone guarantee.
What is this system made of and where is it built?
Every Borla cat-back is handmade in the USA from premium T-304 austenitic stainless steel and is covered by the Borla Million-Mile Warranty.

