surface. Be careful not to gouge the aluminum head.
14. Transfer the O2 sensor from the factory manifold to the new driver side header. Apply a small
amount of antiseize to the threads for the sensor before installing it in the new header. Use
caution not to drop or damage the sensor, they are fragile.
15. As you did on the passenger side, prepare the hardware before installing the driver side
header. Apply antiseize to the threads of the new fasteners. Install the new JBA Header using
the supplied gasket and fasteners. Torque to 23 ft. lbs. Re-install the dipstick tube.
16. Install the driver side catalytic converter.
17. Connect the exhaust system to the new headers using hardware and gaskets supplied.
Reconnect O2 sensors
18. Check to insure adequate clearance between header and shifter cable (small cable that runs
from firewall, to brace on fenderwell, to transmission). More clearance can be gained by
adjusting (bending) brace on fenderwell.
19. Recheck everything!
20. Start the engine and let it warm up Check for leaks. Shut engine off and let it cool down. Check
to make sure all fasteners are tight.
21. All tubular headers require maintenance including periodically checking and retightening of the
header bolts.
Parts List
(1) Driver Side Header Assembly
(1) Passenger Side Header Assembly
(16) 8mm - 1.25 x 25mm header bolts & lock washers (Torque to 23 ft/lbs. with antiseize on threads)
(2) Header gaskets (Header to Head flange)
(6) 3/8” x 2 1/2” Collector Bolts, Nuts & Washers. (Torque to 35 ft.lbs.)
(2) Exhaust pipe gaskets (rings)
Other recommended JBA Products:
Part No.
Application
Description
2010Y
00-02 Tundra 4.7L
High flow Y-pipe
30-9014
00-03 Tundra 4.7L
JBA Evol Exhaust System (stainless steel)
For more information about this and other JBA products visit our website www.jbaheaders.com
