Just got an 04 GTO a week ago and HP Tuners a few days ago. car was originally in California and I'm in Iowa so that explains why it's rich at WOT.I have been reading for a few hours but before I change anything just want some others to take a look. Below is what was added to the car.
MAGNUSONS SUPER CHARGER
DIFF TECHNICS 3.91 GEAR
LS7 CLUTCH
LS7 FLYWHEEL
CORSA CAT BACK EXHAUST
CAT-LESS MIDPIPES
MOROSO DB REDUCER
JBA HEADERS
K&N COLD AIR INTAKE
90MM THROTTLE BODY
90MM MAF SENSOR
SNOW PERFORMANCE METHONAL INJECTION
PATRIOT PERFORMANCE LS6 STAGE II HEADS (650 MAX LIFT)
HARLAND SHARP ROLLER ROCKERS (1.8)
383 STROKER ENGINE
WEISCO PISTONS
SEAT RODS (I BEAM)
LS7 CRANK
COMP CAMS CAMSHAFT (242/248 DEGREE-.648/.650) CUSTOM GROUND FROM COMP CAMS
AROMOTIVE STEALTH 340 LPH FUEL PUMP
TRICK FLOW 60LB INJECTORS