Good afternoon. I just finished installing a new exhaust kit (Cat back) from FCP Groton on my 1991 240. Previous owner had installed the wrong pipes and the axle pipe was vibrating loudly against part of the underside of the car.

New install went relatively smoothly (i had a bit of a struggle trying to get the 2nd rubber hanger attached to the front muffler) and the exhaust now seems to be rattle free. However, i hear the hiss of an exhaust leak at a couple of the connections. Can this be solved by slight repositioning/re-tightening of the clamps when the pipes cool down from my test drive, or is there another trick to eliminate the leaks?

Any and all help is greatly appreciated, this is my first try at doing something to the car that wasn't just tune-up related.