For LS1 in S-10 and Blazer. Very tight fit and good plug access. Includes all hardware necessary for installation. Fits 4.8, 5.3, 6.0 Vortec engines and LS1, LS6, LS2, LS7 1-5/8" Primary Tubes 5/16" Flanges 18 Gauge Tubing 2 1/2" Collector (collector already fitted for 02 sensor) |