Exhaust› Headers, Manifolds and Components

DNA Motoring

Exhaust Header

$66.99

SKU: HDS-HC01EX

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The DNA Motoring HDS-HC01EX is a 4-1 exhaust header designed for the 2001-2005 Honda Civic EX models with D17A2 1.7L 4-cylinder engines.

It includes an O2 sensor insertion point and a metal gasket. The package contains the header exhaust system and installation hardware.
Show original supplier description
The DNA Motoring HDS-HC01EX exhaust header is specifically engineered to enhance the performance of the 2001-2005 Honda Civic EX models equipped with the 1.7L VTEC engine. It features 1.50-inch inlet and 2.25-inch outlet diameters, along with a TIG-welded CNC machine flange for a precise fit. The package includes an O2 sensor insertion point and a metal gasket, ensuring a complete installation. It is intended to increase high airflow, which can instantly provide a power and torque gain of 10-15 horsepower and ft-lbs.
Vehicle Symptoms
  • ticking exhaust leak sound from cracked factory manifold
  • flat/restricted power above 4500 rpm on the D17
  • sluggish acceleration from clogged integrated catalytic converter
  • muffled exhaust note – wants a louder, freer-flowing tone
  • check engine light on with P0420 catalyst efficiency code
Diagnostic Codes
  • P0420 – Cat Sys Efficiency Below Threshold (B1)
Relevant Conversations
  • 2001 Honda Civic EX performance header install guide
  • DNA Motoring HDS-HC01EX 4-1 header review
  • D17A2 exhaust manifold cracked P0420 fix
  • Civic EX aftermarket header P0420 CEL
  • remove integrated catalytic converter from factory exhaust manifold
  • how much power does 4-1 header add to D17 Civic
  • Civic EX header O2 sensor bung location
  • DNA Motoring header vs DC Sports header D17
  • 2.25 inch exhaust after header Civic EX
  • best 4-1 header 2003 Civic EX sound

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandDNA Motoring
Part NumberHDS-HC01EX
CategoryExhaust
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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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