Chevy Trailblazer SS 2006-09 Headers by Stainless Works – 304 Stainless steel headers with 1-3/4″ primaries and catted y-pipe. Includes Y-Pipe to mate to factory exhaust (or catback mounting in same location). You also can add OEM GM Exhaust Manifold Gaskets (recommended). Please note, you will also want to run aftermarket plug wires that either have a 45 degree spark plug boot, or the MSD wires which have bendable bottoms. Check out our ignition wire offerings here!