Pacesetter 70-2268 1-7/8" Long Tube Header for Chevy Silverado/Sierra 1500 5.3/6.2L (Non-CARB Compliant) Mandrel bent 1-7/8" Primary Tubes 3" Slip-Fit Collector Port-matched CNC Machined 3/8" thick flanges One-piece design for easier installation Necessary gaskets and fasteners are included; This item is not for sale in California/Non CARB compliant 3" Slip-Fit Collector Port-matched CNC Machined 3/8" thick flanges Primaries are sequenced into the collector for the best scavenging One-piece design for easier installation Necessary gaskets and fasteners are included