The manifold on my 2013 Nissan Sentra was cracked for a while now probably 3 months until the other day when I started it up my it was so loud my Sentra sounded like a freight train on steroids. I Drove my car to a near by mechanic when he put the car up on the lift he showed me that the manifold had cracked right of the engine, and quoted me $1800. He told me since the car was purchased in CA the catalytic converter was located in the manifold which is why the high cost. My car has 88000 original miles is it worth fixing