I raise the BS flag on a "10-15%" power increase on any shorty/mid length header. A full length header would have trouble making 30-45HP more than stock on a stock engine.
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Had-94,96,98,99 Cobra Stang,99 Navigator,03 Expy, 05 H2
Have-08 Titan C/C,06 GCSRT-425FTLB & AWD, other junk..
Want-08 Viper, 06 M5
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