hi there, i have an e34 with m20b25... it currently has an exhaust system like this: standard manifold with the two pipes running to the middle of the car then it has a 2inch center muffler with single 2inch pipe to a single 2inch muffler....this was done by previous owner, im not sure what benefit it has if any....it is currently leaking and i thought it would be a good time to do some exhaust works, either repair or upgrade....so basically my question is, is this a good setup? any other suggestions? i don't want to spend too much...maybe a budget kept within rm1k...and i want low end torque.appreciate the feedback...thanks in advance guys!