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Exhaust› Catalytic Converters

PLM (Private Label Mfg.)

PLM 4.25" Bell Mouth Header Downpipe w/ Catalytic Converter

$695.00 $475.00 Save $220.00

SKU: PLM-HFG4-HEADER-CAT

In Stock
In Stock
Ships by Jul 30
Free Shipping
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The PLM Power Driven K-Series Header Downpipe is a performance exhaust component designed for the 9th Gen Honda Civic Si FG (2012-2015) and Acura ILX (2013-2015). It features a large 4.25-inch bell mouth design and a 3-inch outlet for improved exhaust flow.

Constructed from 18-gauge stainless steel with CNC machined manifold flanges, this downpipe includes a high-flow, 200-cell metallic core catalytic converter and an O2 sensor adapter.

Fitment

Fitment Guaranteed

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on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandPLM (Private Label Mfg.)
Part NumberPLM-HFG4-HEADER-CAT
CategoryExhaust

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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