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From reading the posts on Mustang6g from both Gibson and Magnaflow..
Both are showing unturned 30rwhp gains, and both are showing 30lbs lighter than stock.
If a few more come back with gains of 20-30whp, I'll be willing to view it was legit.
We'll see
Edit: This quote was interesting..FordService has an active presence on that forum and likely would have disputed this..
"However we only released the dyno sheets with Ford's blessings."
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