PLM Private Label Mfg. Power Driven K-Series Header Downpipe for 9th Gen Civic FG 2012+ & Acura ILX features a large 4.25 inch bell mouth design with a 3 inch outlet. No modifications are needed as it is a direct bolt-on unit to the OEM exhaust cat-back location.
Vehicle Fitment:

• 2012 – 2015 Honda Civic Si
• 9th Generation Civic FG4
• 2013+ Acura ILX

Key Features:

• High flow, 200 cell, metallic core catalytic converter
• Includes gaskets & hardware
• Made of Stainless steel
• One year limited warranty
• Includes O2 sensor adapter – $20 value
• CNC machined manifold flanges
• Flange is .38″ thick
• 18 gauge stainless steel.
• Bolts directly to OEM cat-back exhaust
• Large 4.25 inch bellmouth design
• High grade casting on the bell mouth section
• Precision CNC mandrel bend tubing
• Braided flex pipe section with interlock liner
• One Piece Design
• Bungs for OEM O2 sensors
• Additional bung for wideband sensor