The C4 LSx swap headers feature 1-3/4″ primaries into a 3″ slip fit collectors wuth stout 3/8″ CNC cut flanges. O2 bungs are located in the collector. Passenger side header maintains excellent clearance from the idler arm unlike so many other aftermarket headers. There is also plenty of room between the number 8 primary and the AC evaporator box. The collectors are intentionally angled in towards the center of the car since the exhaust must pass through the transmission crossmember.
NOTE: These will not work with the Corvette batwing oil pan and requires F-body pan and pickup tube.