I've seen better and worse fella. mandrel bends are expensive to make due to machine to do them, most exhaust places won't have one, so crush bends it is. the alternative is buying formed mandrel bends, but these are expensive and as such the exhaust would cost a lot more. after a couple of powerflow exhausts i decided to make my own this time for my ZT and this is what i ended up with:
3" system with mandrel bends welded in, cost about £300 for all the parts.