This Kooks LSX header flange is a 2in D-port LS flange machined from 3/8in thick 304 stainless steel with the stock bolt pattern and a D-shaped port sized for 2in primaries. It is supplied individually for LS engine header fabrication or replacement. From Kooks, a longstanding U.S. exhaust manufacturer, the flange supports reliable fitment in LS applications requiring a D-port interface.
Kooks GM LS Engines 2in SS D Port LS Flange (Bank)