Stainless Works Long Tube Headers & Y-Pipe w/ Catalytic Converters, Factory Connect, 1-3/4 x 3 (1999-2002 Sierra & Silverado 4.8L & 5.3L 2WD) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS