Crowderb
Well-Known Member
- Joined
- Feb 4, 2016
- Threads
- 20
- Messages
- 123
- Reaction score
- 13
- Location
- Clarksville, IN
- Vehicle(s)
- 2015 Mustang GT Performance Package
- Thread starter
- #1
Car made 646 hp with stock exhaust manifolds and cats, now I have put on a set of headers. What do you all think the power gain will be?
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