I did a header pipe and catalyitic converter replacement with Bosal parts, and find I am short one fastener. Does anyone know the size of the bolt that goes straight down into a bracket welded to the top surface of the header pipe in front of the cat in an '87 240 240DL? This bolt fastens the welded-on header bracket to another bracket that connects to the transmission and holds the back end of the header pipe up. I was told that the header bracket takes a 8 mm 1.5 pitch bolt; an uncommon size. I've tried local auto parts stores, hardware stores, outfit I ordered header from (FCPGroton), and the local Volvo dealer without success. The original bolt was corroded/welded onto the bracket of the old header and had snapped off when I tried to unscrew it, so looking for replacement.