FULL BOOSTED RESULTS. SHORTY & LONG-TUBE HEADERS, TB, BLOWER PULLEY AND COMP XE262AH CAMS. THE SHM 4.6L 2V TEST MOTOR WAS GIVEN THIS SERIES OF BOLT-ON MODS, INCLUDING BOOST FROM THE FORD RACING SUPERCHARGER. BEFORE THAT, WE TESTED SHORTY AND LONG-TUBE HEADERS, THEN AFTER THE BLOWER, SWAPPED ON A LARGER THROTTLE BODY, CHANGED THE BLOWER PULLEY THEN ADDED THE COMP CAMS.