flange

So I have a custom exhaust on my truck with 2.25" pipe from the manifold back. Rather than the exhaust shop putting in some kind of taper pipe, they simply put a 2" pipe with a 2.25" pipe and welded up the gap right before the flange. Would it benefit me at all to have that tapered instead? I...

This is my last major problem getting my truck back together. No matter what position I put the manifold and cat flange together at, it leaks. There is no gasket that I know of that goes between the two. any one have any tips on sealing this? The guy at the parts store told me to try copper RTV...

Searched this forum, found about every bolt UPstream of what I'm after. On the 3.0, it's the flange shaped like this: (rotate it 90deg clockwise in your head... recognize it now?) i.e. to replace that gasket, I'm going to have to replace the very rusted bolts and nuts. I'd like to buy 'em...

Hey guys, I have to get this truck done today, and don't know what is going on. I'm installing a new pinion seal and I can't get the flange to pull flush. I have it on as tight as I could hand tighten it, and quickly hit it w/ an impact (not much cause I didn't think I should have to yet) and...