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 2UZ-FE 4.7L V8 with Air Injection:
2005-2006 Tundra 4.7L V8
2005-2006 4Runner V8
2005-2007 Sequoia 4.7L V8
Note: can be use with stock exhaust manifolds.