Nothing's crack, it's the mating gap btwn manifold & downpipe. My suspition is that the dp flange wrapped a little or something during welding when my friend modified my downpipe 2 yrs ago... I remember putting in new gasket donut on each pipe & i can still feel the pulsation of the gas blowing out of the gap...


91-22re(408xxxkm & counting with a rebuilt long block)- Flatbed/Camper
/33x10.5BFG-AT/Open 4:88/1.5"BJS/
+2"Shackles/Add-a-Leaf/AirLift/Dual-Batteries