Alright so today i got the toomey B1 pipe from a guy a couple cities over, pipe is in excellent shape, came with silencer as well, he said it'll fit on the stock mounting hardware, and i've tried and tried but i think the stock was replaced with DG crap from my old pipe, so i'm stuck on what to do, because the pipe is just slightly too small to slide over the exhaust manifold. And i kinda filed it down a tiny bit to see if i could just force them together, but that didn't work and i don't wanna screw with the pipe. Any suggestions?