had the Stillen, loved it, sounded great and kept a somewhat stock appearance, the FI, while great, looks very aftermarket and if you're intending on keeping a somewhat stock appearance, you can throw that out the window. They both make the same gains, so that shouldnt be an issue.
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2011 Mustang 5.0 | 3.55's | Lethal Performance off road H-Pipe | Magnaflow Muffler Delete | JLT CAI/Bama tuned 417whp/ 404 ft/lbs
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