at one point it was police interceptor, taken from the PI heads from the Police 5.0 mustangs that were beefier and allowed more flow than stock ones.... but I might be wrong about the current usage... either way the PI heads, or 99+ heads are a lot less restrictive than the ones you are currently using... it will give a solid gain.
Torinalth
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When you finally shut down the car, just sit back and remember the run.... win or lose, you know it was a surge of adreneline
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