| 2015 Mustang GT headers with 1-7/8" primary tubes, 3" diameter lead pipes and high flow catalytic converters that mate to the factory connection point. Tig welded 304 stainless steel headers with 3/8" thick flanges and 3" diameter slip fit collectors with merge spikes.
This system replaces the factory manifolds, catalytic converters with a superior performing lifetime guaranteed bolt-on system. | 
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