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Exhaust› Headers, Manifolds and Components

DC Sports

4-2-1 Header

Name: 4-2-1 Header
Brand: DC Sports
SKU: THC4402

$312.99

SKU: THC4402

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The DC Sports 4-2-1 Header is a steel exhaust manifold designed to maximize engine output for increased power and torque. Featuring CNC mandrel-bent tubing and flanges, this header offers gains of up to 10 hp. It is available with a ceramic-coated finish and includes all necessary hardware and instructions for installation.

Show original supplier description

The DC Sports 4-2-1 Header is engineered to maximize your engine's output, delivering the most power and torque available. Its race-inspired 4-2-1 design, CAD-rendered for precision, emphasizes low and mid-range power ideal for street or strip applications. The header is constructed from durable steel with a ceramic coating for enhanced longevity and performance. This one-piece header design not only improves ground clearance but also reduces overall weight by eliminating middle flanges, making it significantly lighter than stock and two-piece systems. The use of CNC mandrel bends and robotically-welded fittings ensures a perfect fit, while CNC-machined and threaded flanges contribute to optimal system tuning for power gains across the entire RPM range. Equal length primary piping further refines the exhaust gas flow for increased power. Professional installation is recommended to ensure proper fitment and performance. This header is specifically designed to fit the 2000-2004 Toyota Celica. If your vehicle has aftermarket or custom altered parts, it is the installer's responsibility to verify fitment.

Vehicle Symptoms

Loss of low-end power during acceleration
Engine feels sluggish from stoplights
Exhaust note is too quiet or restrictive
Reduced fuel economy around town
Check engine light with no obvious cause

Relevant Conversations

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4-2-1 header vs 4-1 header which is better
DC Sports TH4402 installation difficulty
will a header fix my sluggish acceleration
ceramic coated header vs stainless steel durability
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check engine light after header install how to fix

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

Brand	DC Sports
Part Number	THC4402
Category	Exhaust

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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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