JBA is proud to offer accessories to aid in the fitment of your JBA exhaust product. JBAs premium header flange gaskets are made extra thick from a specially made formulated gasket material. Our gaskets are rated up to 1100 F. Each gasket handles exhaust pressures up to 3700 psig. Each gasket is designed for an exact port match with JBA headers. Limited One Year Warranty. JBA Performance Exhaust 063-2035 Fits Toyota 4.0L 2003-2011 Header Gaskets w/o air injection. JBA Performance Exhaust 063-2035 Fits Toyota 4.0L 2003-2011 Header Gaskets w/o air injection.