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Exhaust› Headers, Manifolds and Components

Stainless

SM11HCATX Long Tube Headers w/ 3-Inch X-Pipe & Cats

$1,699.00 $1,614.00 Save $85.00

SKU: SW-SM11HCATX

Out of Stock
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 Stainless Power SM11HCATX is a set of long tube headers designed for the 2011-2014 Ford Mustang GT 5.0L. These headers feature 1-7/8 inch primary tubes and a 3-inch X-pipe with high-flow catalytic converters. They are constructed from TIG welded 304 stainless steel with 3/8 inch thick flanges.

The system replaces the factory manifolds, catalytic converters, and H-pipe, offering a superior performing bolt-on solution. The headers connect to the factory exhaust system and are designed for a 24-month guaranteed fit.
Show original supplier description
The Stainless Power SM11HCATX is a performance exhaust header system engineered for the 2011-2014 Ford Mustang GT equipped with the 5.0L engine. This kit replaces the stock manifolds, catalytic converters, and H-pipe with a high-flow design, featuring 1-7/8 inch primary tubes that lead into a 3-inch X-pipe and 3-inch diameter lead pipes. Constructed from durable TIG welded 304 stainless steel, these headers include 3/8 inch thick flanges for a robust connection. The system is designed as a direct bolt-on, connecting to the factory exhaust at the stock connection point. It comes with high-flow catalytic converters to help maintain emissions compliance in certain regions and is backed by a 24-month guarantee. Installation involves replacing the factory manifolds and associated components. This upgrade is intended to optimize airflow and exhaust scavenging, potentially leading to improved performance. The product is noted as not being California legal.

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

BrandStainless
Part NumberSW-SM11HCATX
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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