  4.6L Best performance up to 6000 rpm. Nice idle, good driveability down to 1700 rpm, performance range 2200-6000 rpm. Recommend AFM valve spring kit but stock valve springs will work. Works best with 80mm mass air, 70mm throttle body and TFS or Dragon Plenum. Headers and ported P.I. heads are suggested. Gears 3.27 to 4.10. With automatic transmission needs 2700-3000 converter. |
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