Actually they give no power. Put it on a dyno and you may even loss a couple. But I have never heard of anyone who put 3.73s or 4.10s in a modular mustang and regretted it.
I sure as heck don't.
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1997 Cobra
Suspension: Steeda G Trac. Tokico Illumina shocks and struts, Sport Springs, upper and lower control arms, cc plates, rear adjustable sway bar, front sway bar, subframe connectors, bushings, Cobra R wheels
Exhaust (soon): FRPP ceramic headers, Bassani X-pipe w/ cats, Dynomax Ultra Flow cat-back
Bolt-ons: 4.10s, Steeda Tri-Ax, Pro-M 80mm, K&N, Steeda Underdrive pulleys, Steeda timing adjuster (soon)
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