Yes, you probably will lose power going from 2 1/2" to 3". What you have is perfectly fine. Just another note: If you have an offroad pipe (no cats) your check engine light will not come on. ~Brian
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1989 Black Mustang GT Hatchback, Underdrive Pulles, Electric Fan, Cold Air Intake, Headers, Offroad H-Pipe, Magnaflow catback, Steeda Tri-Ax, Fluidyne Aluminum Radiator, Timing at 14*, 3.73's
Coming not so soon: 408w
Ricer Hater's Club Member #59
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