Stainless Works
Stainless Power 2011-14 Mustang GT Headers 1-7/8in Primaries High-Flow Cats 3in X-Pipe
SKU: S00K SM12HCATX
Description
Part #: SM12HCATX
2011-14 Mustang GT headers with 1-7/8" primary tubes, 3" X-Pipe, 3" dia lead pipes and high flow catalytic converters that mate to the Stainless Works exhaust. Tig welded 304 SS headers with 3/8" thick flanges and 3" dia slip fit collectors with merge spikes. This system connects to SW Performance Connect exhausts for a full 3" diameter superior performing lifetime guaranteed bolt-on system.
2011-14 Mustang GT headers with 1-7/8" primary tubes, 3" X-Pipe, catted lead pipes, Tig welded 304 SS headers with 3/8" thick flanges. This system connects to SW Performance Connect exhausts for a full 3" diameter system.
Fitment
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Specifications
| Brand | Stainless Works |
| Part Number | S00K SM12HCATX |
Videos
Ford Mustang 2011-2014 5.0 Headers and Exhaust (before and after)
2011-2014 Mustang (GT) Stainless Works Long Tube Headers and Off-Road X-Pipe Kit Review
2011-2014 Mustang GT Stainless Works LTH & High Flow Catted X-Pipe Kit Review
'11 Mustang GT 5.0: Full Exhaust - Stainless Works(Through SpeedTech) - Flyby & Idle
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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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