I bet you'll problably find a leak on that rear pipe you modified. Or at least it will most likely blow off. Dunno how much boost you plan to run, but I'd have a friend weld a bead around the edge of any flat pipe to coupler connections.
My hints for anyone reading this type of upgrade. Remove hood, it take 2 minutes really. Pull the engine/trans. Its cake and makes getting the work done 1000% more enjoyable when you have tasks on every angle of the engine. Last but not least a good supply of cold beer (or whiskey if your in a hurry).
Looks good have fun.
