These Hooker BlackHeart LT swap headers fit 1988-1998 Chevrolet/GMC C1500/K1500 2WD/4WD trucks. These mid-length headers provide enough flow for stock and mid-level engine performance, and are made from 304 stainless steel for strength & corrosion resistance. These Headers are one part of a fully engineered swap system for the GMT400 / OBS trucks.