C6/Z06 Kooks Header Install

Admin Number of posts: 1231 Registration date: 2009-01-30

Z51 Joel just added a nice set of kooks 1 7/8 longtube headers to his LS3

and a nice 3 inch x-pipe from kooks also

Disconnect the Battery using a 10mm wrench then remove the dipstick and tube by removing the 15mm screw that holds the tube to the block

Raise the vehicle atleast 24inchs off the ground and support using jackstands

Remove the spark plug wires and the spark plug

Remove the front and rear O2 sensors but only remove the rear at this time

We then removed the complete exhaust with the exception of the catback because we were going to reuse it

with the old system on the ground you can remove the front two oxygen sensors
remove the automatic transmission cooling line hold down bracket located on the passenger side of the block just forward of the bell housing

connect the oxygen sensor to the kooks header and tighten

slide the header up from under the vehicle, attach the header and gasket with two of the 13mm bolts from the installation kit but do not tighten them....we decided to use the OEM gasket

Since the factory Oxygen Sensor is not long enough kooks supplies you with a longer sensor..at this time reconnect the front sensor using the new harness

Install the remaining header bolts but do not tighten

Install the kooks xpipe and midpipe using the clamps provided....after everything is aligned you can now tighten the full assembly connect the rear oxygen sensors using the remaining two harnesses

reinstall the dipstick and tube and connect the battery

and enjoy