Injen Axle Back Exhaust Honda Civic SI 2012-2015 | SES1579

Product Fitment: 

2012-2015 Honda Civic SI

Enhance your Civic Si’s sound, performance, and style with the Injen Axle-Back Exhaust System, engineered specifically for the 2012–2015 Honda Civic Si 2.4L. Designed and manufactured in Pomona, California, this system delivers a perfect blend of aggressive tone, increased power, and premium build quality.

Constructed from mandrel-bent 304 stainless steel tubing, this exhaust maintains consistent diameter throughout for smooth, unrestricted airflow. The result is improved exhaust efficiency and measurable performance gains. Dyno-proven results show increases of up to 7 horsepower and 6 lb-ft of torque, giving your Civic Si a noticeable boost in responsiveness.

Featuring Injen’s classic round JDM-style rear muffler, this system produces a deep, aggressive exhaust note without excessive drone. The setup is finished with a 4.0-inch polished exhaust tip, adding a clean, performance-inspired look to your rear end.

Each system is handcrafted and TIG welded for maximum strength and durability, using premium components like investment cast flanges, stainless steel hardware, and custom hangers. Designed as a direct bolt-on solution, installation is quick and hassle-free with no cutting or welding required.

Key Features:

• Direct fit for 2012–2015 Honda Civic Si (2.4L)

• Axle-back exhaust system design

• Dyno proven gains of up to 7 HP and 6 lb-ft torque

• 60mm mandrel-bent 304 stainless steel piping

• Classic JDM-style round rear muffler

• 4.0” polished exhaust tip for a clean finish

• Investment cast stainless steel flange for easy installation

• Handcrafted and TIG welded for durability

• Includes all necessary hardware and hangers

• No cutting or welding required

Performance Benefits:

• Improves exhaust flow and engine efficiency

• Enhances horsepower and torque output

• Produces a deep, aggressive exhaust tone

• Upgrades vehicle appearance with polished finish

Construction & Design:

• Premium 304 stainless steel construction

• Mandrel-bent tubing for consistent airflow

• Built and tested in Pomona, California, USA

• Designed for long-term durability in all driving conditions