Invidia HS12HC4GTT N1 Cat-Back Exhaust for 2012-2015 Honda Civic Si Sedan

Vehicle Fitment

• 2012-2015 Honda Civic Si, Sedan (9th Gen)

Fitment Notes

• Sedan-specific -- Coupe uses part HS12HC2STT
• Includes removable silencer for noise regulation compliance
• 10th Gen (2017+) Civic Si Sedan uses a separate Gemini/R400 exhaust line

Features

• N1 Racing Series design
• Small race canister reduces rear weight
• Maximized airflow
• High-quality SUS304 stainless steel
• CNC-machined flanges
• Polished finish
• Mandrel-bent stainless steel piping
• Deep, aggressive exhaust tone
• Strong mid to top-end power gains

Specifications

• Piping diameter: 70mm (2.75")
• Exhaust tip diameter: 101mm
• Tip material: Titanium
• Material: SUS304 stainless steel
• Finish: Polished

Included Components

• 1x N1 Cat-Back Exhaust System
• 1x Titanium Tip
• Removable Silencer

Product Description

Invidia's N1 Cat-Back Exhaust brings a strong balance of price and performance to the 9th generation Civic Si Sedan, built from high-quality SUS304 stainless steel with CNC-machined flanges and a polished finish. Mandrel-bent piping maximizes exhaust flow and reduces back pressure, delivering strong mid to top-end power gains alongside a genuine increase in horsepower and torque.

A small race canister keeps rear weight down while producing the deep, aggressive exhaust tone the N1 Racing Series is known for. A 101mm titanium tip finishes the system with a durable, corrosion-resistant look that holds up over the long haul.

Includes a removable silencer, allowing the system to stay within local noise regulations when needed. Sedan-specific fitment -- the Coupe uses a separate part number.