JBA 1615SJT - Manual (Page 3)

INSTALLATION INSTRUCTIONS:
1. Place vehicle in a location where the floor is solid and flat, with adequate lighting. Do not attempt
to work on a hot engine. Heat causes metal to expand and makes removal of fasteners difficult at best.
Raise the front of the vehicle to obtain adequate access to the bottom exhaust manifold flanges. Use
large-base jack stands to support the vehicle. Do not rely on the jack! Block the tires to prevent the
vehicle from rolling off the jack stands.
2. Disconnect the negative battery cable from the battery.
3. Disconnect the spark plug wires by grasping and gently twisting the spark plug wire boots. Do not
pull on the wires! Brush or blow any debris which may have collected around the manifolds or spark
plugs. This will help prevent foreign matter from entering the combustion chamber when the manifolds
are removed. Depending on your application it may be easier to install if you remove the spark plugs.
4. Apply penetrating oil on all accessible fasteners and fittings before attempting to remove them.
5. Unbolt the Driver’s side exhaust manifold and remove. Remove the gaskets and any gasket material
or any carbon deposits that remain on the head surface. The use of a gasket removal agent will ease the
removal of any gasket material. Use care not to get debris into ports or spark plug holes.
6. Bolt the header to the head using the supplied gasket, Header bolts and Header Lock washers. Ap-
ply anti-seize to the header bolts if installing on aluminum heads. Torque to 30 lbs./ft. on iron heads, 23
lbs./ft. on alum.
7. Unbolt the passenger side manifold and remove. Remove the gaskets and any gasket material or any
carbon deposits that remain on the head surface. The use of a gasket removal agent will ease the remov-
al of any gasket material. Use care not to get debris into ports or spark plug holes.
8. Reinstall the spark plugs (if removed) and plug wires.
9. Check that all bolts are tight. Make sure that all wiring, fuel lines, transmissions lines, brake lines etc
are clear of the headers and the exhaust and relocate as necessary.
10. Reinstall the negative battery cable.
11. The installation of the headers is now complete.
12. 3 Bolts flanges and bolts are included to adapt the exhaust system to the JBA headers. Welding is
required to complete your exhaust system.
13. After the exhaust modification have been made to adapt the headers to your exhaust system, recheck
everything! Make sure all bolts are tight.
14. 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.
15. Tubular Headers require maintenance including periodically check and retighten the header bolts.