Exhaust› Headers, Manifolds and Components

DNA

4-1 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 HDS-HC01EX is a 4-1 exhaust header designed for 2001-2005 Honda Civic EX models with D17A2 1.7L 4-cylinder engines. It is constructed from T304 stainless steel with TIG welded CNC machine flanges. This header aims to increase airflow and improve engine performance.
Show original supplier description
It features mandrel bends and TIG welded CNC machine flanges for a precise fit and optimal exhaust flow. This header is designed with a 1.50-inch inlet and a 2.25-inch outlet, aiming to increase airflow and deliver an immediate gain of 10-15 horsepower and torque. This exhaust header is compatible with 2001-2005 Honda Civic EX models equipped with the D17A2 1.7L 4-cylinder engine only. Installation hardware and exhaust gaskets are typically included. IMPORTANT EMISSION NOTICE: This product is intended for closed-course race or competition use ONLY on 1975 model year or newer vehicles and is NOT legal for street use on public roadways. Its manufacture, sale, offer for sale, or installation may be illegal nationwide under the Federal Clean Air Act and in states that have adopted California's emissions regulations. Buyers are responsible for confirming local laws and regulations prior to purchase. This product may also contain chemicals known to the State of California to cause cancer or reproductive harm.

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
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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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