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Exhaust› Headers, Manifolds and Components

Stainless Power

1-7/8-Inch Primary Long Tube Header System w/ 3-Inch X-Pipe

$1,699.00 $1,614.99 Save $84.01

SKU: SM11HCATX

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

Moderate — 2–4 hours

Overview

The Stainless Power long-tube header system is a high-performance exhaust upgrade for 2011-2014 Ford Mustang GT models. This bolt-on kit replaces the factory manifolds and catalytic converters with TIG-welded 304 stainless steel tubing, featuring 1-7/8-inch primaries and a 3-inch X-pipe to improve exhaust flow.
Show original supplier description
The Stainless Power long-tube header system is engineered to replace factory manifolds, catalytic converters, and the H-pipe on 2011-2014 Ford Mustang GT 5.0L vehicles. Constructed from TIG-welded 304 stainless steel, this system utilizes 1-7/8-inch primary tubes, 3/8-inch thick flanges, and 3-inch diameter slip-fit collectors with merge spikes. The design includes 3-inch diameter lead pipes and high-flow catalytic converters that mate to the factory connection point for a direct-fit installation. Designed for superior performance, this bolt-on system is backed by a 24-month guarantee. While installation is straightforward, it is intended for track or off-road use only. For optimal fitment, some users have reported that loosening the motor mounts allows for necessary engine clearance adjustments during the install process. The system is specifically compatible with the 2011-2014 Mustang GT and should be inspected immediately upon receipt for any shipping damage before beginning the installation process.

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 Power
Part NumberSM11HCATX
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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