Injen Axle-Back Exhaust - Honda Civic Si 2.4L 2012-2015 - Polished 4in Tip

Injen axle-back exhaust for the 2012-2015 Honda Civic Si 2.4L. Built from full 60mm mandrel-bent 304 stainless tubing with Injen's classic round JDM-style rear muffler and resonated rolled tips for a clean, aggressive note. TIG-welded and handcrafted in Pomona CA with a stainless investment-cast flange, finished with a 4.0in polished tip. Dyno-proven gains up to 7 hp and 6 lb-ft; no cutting or welding required.

Specifications

Documents: Installation Instructions (PDF)

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy