Borla ATAK Axle-Back Exhaust System for 2015-2019 Chevrolet Corvette C7 Z06 and 2017-2019 Grand Sport 6.2L V8, Part Number 11903

This Axle-Back system does NOT have AFM valves but is equipped with NPP valves. This system features the aggressive ATAK(r) sound and exits through 4.25" polished intercooled T-304 stainless steel tips. Black coated T-304 stainless steel tips are also available. Borla(r) Cat-Back(tm) & Axle-Back exhaust systems feature patented straight-through and multi-core technology to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive Borla(r) Sound of Power respected by motoring enthusiasts everywhere. Each system is built from premium T-304 austenitic stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Borla(r)'s C7 Corvette Axle-Back exhaust systems are covered under our Million-Mile Warranty for non-moving parts, the exhaust valves are warrantied for 1 year. Failures of original equipment AFM and NPP actuators are not covered by the Borla(r) warranty ATAK Axle-Back Exhaust System 2015-2019 Chevrolet Corvette (C7) Z06 6.2L V8 Automatic/ Manual Transmission/ 2017-2019 Grand Sport 6.2L V8 Manual Transmission ONLY Rear Wheel Drive 2 Door WITHOUT AFM Valves With NPP Valves. Million Mile Warranty 2015-2019 Chevrolet Corvette Z06 (C7) 6.2L V8 Automatic/ Manual Transmission/ 2017-2019 Corvette Grand Sport (C7) 6.2L V8 Manual Transmission ONLY Rear Wheel Drive 2 Door WITHOUT AFM Valves With NPP Valves.

• System does NOT have AFM valves, but does have NPP valves
• For 2017-2019 Grand Sport fits Manual Transmission ONLY

Upgrade your Chevrolet Corvette C7 with the Borla ATAK Axle-Back Exhaust System, Part Number 11903. Designed for 2015-2019 Corvette Z06 models and 2017-2019 Corvette Grand Sport models, this system delivers Borla’s aggressive ATAK sound while improving exhaust flow and driving character. It is compatible with automatic and manual transmissions on the Z06, while Grand Sport applications are limited to manual transmission models.

This axle-back system does not include AFM valves and is equipped with NPP valves. Exhaust exits through polished intercooled T-304 stainless steel tips, with black-coated T-304 stainless steel tips available separately. Borla’s patented straight-through and multi-core technology helps increase exhaust velocity for responsive performance, enhanced sound, and efficient gas flow. Ultra-smooth mandrel bends and precision CNC manufacturing support consistent fitment and maximum flow.

Constructed from premium T-304 austenitic stainless steel, the Borla ATAK system is engineered for long-term corrosion resistance and durability. The exhaust valves are covered by a one-year warranty, while non-moving components are covered by Borla’s Million-Mile Warranty. Original equipment AFM and NPP actuator failures are not covered by the Borla warranty. Professional installation is recommended to ensure correct valve operation and alignment.

Key Product Specifications & Technical Data

• Brand: Borla
• Part Number: 11903
• Product Type: Axle-back exhaust system
• Sound Level: ATAK aggressive performance sound
• Valve Configuration: NPP valves included; AFM valves not included
• Material: T-304 austenitic stainless steel
• Tip Style: Polished intercooled quad round rear-exit tips
• Warranty: Million-Mile Warranty on non-moving parts; one-year warranty on exhaust valves

What's Included

• Borla ATAK axle-back exhaust system
• Polished T-304 stainless steel exhaust tips
• Installation hardware as supplied by the manufacturer

Fitment: 2015-2019 Chevrolet Corvette C7 Z06 with a 6.2L V8 and automatic or manual transmission; 2017-2019 Chevrolet Corvette C7 Grand Sport with a 6.2L V8 and manual transmission only. Fits rear-wheel-drive, two-door applications equipped with NPP valves and without AFM valves. This product may require acknowledgment of California emissions requirements before purchase.

Features:

• Delivers Borla’s aggressive ATAK sound for a more assertive Corvette exhaust note.
• Uses NPP valves while specifically designed for applications without AFM valves.
• Patented straight-through and multi-core technology promotes increased exhaust velocity and performance.
• Premium T-304 stainless steel construction, mandrel-bent tubing, and polished intercooled tips provide durable, high-flow performance.

Fitments:
2015 Chevrolet Corvette Z06
2016 Chevrolet Corvette Z06
2017 Chevrolet Corvette Grand Sport
2017 Chevrolet Corvette Z06
2018 Chevrolet Corvette Grand Sport
2018 Chevrolet Corvette Z06
2019 Chevrolet Corvette Grand Sport
2019 Chevrolet Corvette Z06

Air Freight Prohibited: false
Not Carb Approved: false
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1