I have jba's on my car. Notice more higher rpm horse power and a better pull. I dont have before or after horsepower numbers. But I would do it again.
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2014 sterling gray 5.0 mustang gt. MT82, 3.55 gears with few mods
1973 mercury comet 347ci Jerico 4 speed tranny
1978 mercury Capri 2.8l German v6
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