This Borla cat-back exhaust system is built for the verified 2023-2025 Toyota GR Corolla Circuit Edition application listed below. Select it by exact manufacturer part number 140942CB and confirm the full engine, drivetrain, body, wheelbase, factory-exhaust, and Borla application notes before ordering.

Key Features

• Black Coated Tips: Four T-304 stainless steel tipstwo 3.5-inch round center and two 4.5-inch round outerfor a bold rear stance.
• T-304 Stainless Steel Construction: Mandrel-bent pipes and CNC precision ensure maximum flow, durability, and direct bolt-on fit.
• ATAK Sound: Aggressive exhaust note with no interior drone, achieved through Polyphonic Harmonizer technology using varied pipe diameters and lengths for harmonized tones.
• Active Exhaust Valve: Factory-integrated valve allows switchable sound levels between touring and sport modes for versatile driving.
• Systems with polished or carbon fiber tips available separately.
• Bolt-on design uses factory hangers and clamps; no cutting or welding needed.

Fitment

Specifications

What’s Included

One new Borla product identified by manufacturer part number 140942CB. Clamps, hangers, gaskets, tips, pipes, tools, and companion parts are included only when expressly listed for this exact part number.

About Borla

Borla develops stainless-steel exhaust systems, mufflers, tips, pipes, and related components for vehicle-specific and universal performance applications. Product selection remains exact-application and exact-part-number specific.

Related Borla Products

• Borla 23-24 Toyota GR Corolla ATAK Cat Back System – Carbon Fiber & Black Anodized
• Borla 20-25 Toyota GR Supra ATAK Cat-Back Exhaust System w/ Black Chrome Tips
• Borla 23-24 Toyota GR Corolla ATAK Cat Back System

Browse the Borla collection for related exhaust systems and components.

Frequently Asked Questions

Will this Borla part fit my 2023-2025 Toyota GR Corolla Circuit Edition?
That application is listed, but confirm the engine, drivetrain, body or cab style, wheelbase, factory exhaust layout, tip opening, and every Borla application note before ordering.

Will this change require an engine tune?
A cat-back, axle-back, tip, muffler, or post-catalyst component usually does not require tuning, but confirm the exact application, emissions configuration, oxygen-sensor locations, and local requirements before installation.

What should I inspect before installation?
Check the shipping carton and components against the exact part number, then inspect clamps, hangers, gaskets, mating flanges, clearances, tip alignment, and required reused factory hardware before removing the original exhaust.

Installation Instructions

Follow the current Borla instructions and vehicle service information for this exact part number. Let the exhaust cool, support the vehicle safely, compare all parts before removal, protect sensors and wiring, use the specified clamps and torque values, align all joints and tips without preload, confirm body and suspension clearance, check for leaks, and retorque after the first heat cycles. Professional installation is recommended.