OK I have a 2000 Z-71, I put a 5.3 from an 05 avalanche, Heres what iv done so far, 4.10 gears, K&N cold air kit, Flowmaster 40 series single pipe, trinity programmer, with the rear O2 delete done. corvette servo, throttle body spacer,. Im looking on adding long tube headers, and a BBK Throttle body real soon. What kind of gains can I see from these? Also keep in mind I drive from louisiana to west tx every week for work, What else should I do to beef power up? AFacebookHomescreenImage_3.jpgnd what gains would I get? Thanks