Borla 23-24 Toyota GR Corolla ATAK Cat Back System - 140942

The Borla ATAK Cat-Back Exhaust System (Part #140942) is a purpose-built performance exhaust upgrade for the 2023–2024 Toyota GR Corolla, engineered specifically around the car's 1.6L three-cylinder turbocharged engine. If you've always felt the GR Corolla's factory exhaust note doesn't match its rally-bred personality, Borla's ATAK-level system delivers a head-turning racing growl that transforms the driving experience — all without introducing unwanted cabin drone. Built from premium T-304 stainless steel and backed by Borla's Million Mile Warranty, this is one of the most compelling Borla cat-back exhaust options on the market for GR Corolla owners.

Key Features & Benefits

• ATAK Sound Level: Borla's most aggressive sound profile produces a head-turning racing growl tailored to the GR Corolla's 1.6L turbo three-cylinder — giving the car the exhaust note its performance deserves without excessive interior noise at cruising speeds.
• Patented Polyphonic Harmonizer Technology: Borla's proprietary internal tuning technology manages exhaust harmonics to produce a full, layered sound character — a hallmark of the Borla exhaust system lineup that separates it from generic aftermarket options.
• Functioning Exhaust Valve Retained: Unlike many cat-back systems that delete the OEM exhaust valve, this Borla ATAK cat-back exhaust includes a functioning valve just like the stock system — preserving the variable sound behavior you already have and preventing check-engine or system errors tied to the valve.
• No Drone: Despite the aggressive ATAK sound level, the system is engineered to eliminate drone inside the cabin, making it a practical daily driver upgrade — not just a track-day piece.
• 3" Pipe Diameter: The system runs a 3-inch main pipe diameter, providing improved exhaust flow over the factory system to complement the GR Corolla's turbocharged powerplant.
• Quad-Tip Upgrade — Dual 3.5" Center Tips + 4.5" Outer Tips: The factory oval center tip is replaced by an aggressive quad-tip exit design. Tip finish options include polished silver, ceramic black, or carbon fiber — letting you match the exhaust tips to your build's aesthetic.
• T-304 Stainless Steel Construction: Every Borla exhaust system is manufactured from T-304 series stainless steel, chosen for its resistance to corrosion, heat cycling, and long-term durability under demanding driving conditions.
• Million Mile Warranty: Borla backs this system with their Million Mile Warranty, a statement of confidence in the quality and longevity of their stainless steel construction.
• Cat-Back Design: Replaces everything from the catalytic converter back, leaving emissions-critical components untouched — a key consideration for street-driven GR Corollas subject to emissions inspections.

Specifications

• Part Number: 140942
• SKU: BOR140942
• System Type: Cat-Back Exhaust
• Sound Level: ATAK (Borla's most aggressive sound profile)
• Main Pipe Diameter: 3" (transitioning to dual 2.5")
• Tip Sizes: 4.5" outer tips and dual 3.5" center tips
• Tip Finish Options: Polished Silver, Ceramic Black, Carbon Fiber
• Muffler Design: Dual muffler
• Technology: Polyphonic Harmonizer
• Exhaust Valve: Functioning valve included
• Material: T-304 Stainless Steel
• Engine Application: 1.6L Three-Cylinder Turbocharged
• Warranty: Million Mile Warranty
• Proposition 65: Yes — California Prop 65 warning applies

Fitment

This Borla ATAK cat-back exhaust is confirmed to fit the following 2023–2024 Toyota GR Corolla trim levels:

• 2023–2024 Toyota GR Corolla — Core
• 2023–2024 Toyota GR Corolla — Circuit Edition
• 2023 Toyota GR Corolla — Morizo Edition
• 2024 Toyota GR Corolla — Premium

All fitments are for the 1.6L three-cylinder turbocharged engine. If you are unsure whether this system fits your specific build configuration or model year, use the fitment checker on this page or contact the ThreePiece.us team directly for confirmation before ordering.

What's in the Box

• Borla ATAK Cat-Back Exhaust System (Part #140942)
• Functioning exhaust valve (replaces and mirrors OEM valve behavior)
• Quad exhaust tips in your selected finish (Silver, Ceramic Black, or Carbon Fiber)

Why Buy from ThreePiece.us

ThreePiece.us carries the Borla ATAK cat-back exhaust system for the GR Corolla with free shipping on every order — no minimums, no hidden freight fees. Our team has served 10,000+ enthusiasts and is equipped to help you confirm fitment, talk through tip finish options, or answer install questions before you buy. Financing is available through Affirm, so you can get the exhaust system your GR Corolla deserves without waiting. Have questions? Call us at 813-535-5801 or use the fitment help button on this page to reach our team directly.

Frequently Asked Questions

Q: Will the Borla ATAK exhaust work with the GR Corolla's OEM exhaust valve system?
A: Yes. This system is specifically designed to include a functioning exhaust valve, just like the stock exhaust. You won't lose the variable sound behavior or trigger any valve-related warnings by installing this system.

Q: Is the ATAK sound level too loud for daily driving? Will there be drone?
A: Borla engineers the ATAK system to deliver an aggressive, head-turning racing growl while remaining free of cabin drone. The dual muffler design and Polyphonic Harmonizer technology work together to tune out the resonant frequencies that cause fatigue on highway drives — making this a system you can genuinely live with every day.

Q: Which tip finish should I choose — Silver, Ceramic Black, or Carbon Fiber?
A: All three finishes use the same quad-tip exit configuration (4.5" outer and dual 3.5" center tips) and the same underlying exhaust system. The choice is purely aesthetic. Polished silver is the classic Borla look; ceramic black offers a blacked-out, stealthy appearance; and carbon fiber provides a motorsport-inspired premium finish. The tip finish option is selected at the time of purchase.

Q: Does this fit the 2023 Morizo Edition GR Corolla?
A: Yes. The 2023 Toyota GR Corolla Morizo Edition is listed as a confirmed fitment for Part #140942. All GR Corolla variants share the same 1.6L turbocharged three-cylinder engine that this system is built around.