Features:

• Works with all LS engines including LS1, LS2, LS3, LS6 and LS7 or Vortech 5.3L-6.0 L engines
• Premium fitment with optimized ground clearance. The only 1975-81 specific header design in the marketplace
• Laser cut 3/8" flanges with flat-finished TIG welded port sealing
• 1-7/8" primaries/3" collectors
• Designed and intended for installation only with Hooker LS swap engine mounting brackets and transmission crossmembers for this application. Will not install with any other brand of mounts
• Compatible with QuickTime™ bellhousings, mechanical clutch linkage (requires custom Z-bar/pivot ball assembly), stock A/C evaporator case on firewall, straight boot spark plug wires and Holley LS swap oil pan and accessory drive brackets
• Connects directly to Hooker 3" 2nd-gen F-body exhaust system. Connection to 2-1/2" Hooker 2nd-gen F-body exhaust system requires the use of an available mid-pipe kit
• Compatible only with stock height subframe/body mounts. Installation with half-height mounts will require modification to vehicle floor panels
• Automatic and manual transmission compatible
• Will not install with factory column shift linkage, Lokar or similar aftermarket shift cable or linkage required for column shift applications