havent read all the responses on this thread, but if your father is looking to upgrade his gtr, the first thing he wants to get is a cobb. its the best thing EVARRRR lol. depending on how much he wants to spend, the next thing he should get are a midpipe and downpipes. I have this setup with a custom tune from Jack Cecil at HorsepowerLogic (in south florida, but he tunes around the world) and my car runs high 10's in the 1/4, completely reliable and safe, and im around 530whp on a mustang dyno. PM me if you want more detailed info and more support.
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