2004-08 F150 5.4L 2WD/ 4WD Triton headers made with 304 stainless steel featuring 1-3/4" diameter primaries with high-flow catalytic converters, 2-1/2" diameter lead pipes and clamps. Connects to Stainless Works true-dual exhaust systems (08F150TDRT or 08F150TDUB). Fits Supercrew 5.5' or 6.5' bed or Supercab 6.5' bed.