2004-08 F150 5.4L 2WD/ 4WD Triton headers with 1-3/4" diameter primaries featuring high-flow catalytic converters, 2-1/2" diameter lead pipes and clamps. Designed with Y-pipe which connects to factory connection point. Fits Supercrew 5.5' or 6.5' bed or Supercab 6.5' bed.