A: This stainless steel gasket installs at center hole of the X-Cooler base against the flat flange on the steel header. B: This silicone O-ring installs behind the header flange to prevent water leaking into the exhaust header. C: This green fluorine O-ring installs behind the silicone O-ring to prevent the water leaking out from the center hole of the cover. D: This O-ring installs in the groove of the X-Cooler cover against the main block to prevent the water leaking from join area. |