i gotta see the car but it usually takes like 6 j bends, a 4ft straight, 2 pairs of flanges, a flexpipe, a resonator, and a muffler to have all the parts u need to put a turbo back system together. Plus all the hanger hardware. A mandrel bend is a bend that maintains the same diameter throughout the entire bend, the bends you see at the autoparts store and muffler shops are ususally crush bends, meaning the diameter in the bend is drastically smaller than that of the straights. who is welding your pipes up for u?