JBA Headers use the old style raised sealing ring for the cylinder head flange. Because of this you will have to use their crush to seal gaskets and the Toyota multi-layered stainless steel gaskets do not seal with the JBA headers.
This gasket set will fit the Toyota 1GR-FE V6, Single VVTi, 4.0L without air injection found in the:
2005-2011 Tacoma V6
2003-2009 4Runner V6
2007-2009 Tundra V6
2007-2009 FJ Cruiser
Note: can be use with stock exhaust manifolds.