hi fellas

you blokes always seam to have the answers to most tojo questions. a mate of mine has one of the last 4wd 2.7 liter hiluxes the 3rz something something engine. He asked me if i would recomend getting some afftermarket headers for it and to be honest i dont know to what extent tthey would help on this engine. so whats the oppinions on power improvment and torque improvment and fuel ecconomy improvment if any. any advice would be sweet