When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I'm thinking a was blessed with a factory freak. Last time I went to a dyno day, I beat every 2011-13 that was stock or just had CAI+tune...even a 13 that had a CAI and Bama tune with the same setup as me (3.73s w/ manual and brembo).
I would most definitely say you managed to snag a freak engine or freak rear diff or both from the factory.
Most 2011-2012 GTs /w 3.73s & Manual bone stock that I have seen put on a dyno put out roughly 370-375hp range so for you to be getting that added 14-19rwhp would definitely say you got a sweet deal outta that purchase