Hello all. In a couple days I might buy a 2009 Titan SE. I est drove it today and it seems in pretty good shape. Its a rebuilt title because the original owner got T-boned and had to have the driver side front and rear doors replaced. I spent a good amount of time under the truck looking for damage to the Uni-body and could not see any. The engine and tranny seem to be in great shape. No visual leaks anywhere and it idles and shifts smooth. My biggest worry is it has the stock exhaust manifolds and cats. I have read horror stories about the engine potentially getting destroyed from back pressure from crumbling cats getting sucked into the engine?? Is this all real or fear tactics from exhaust sellers? How hard would it be to cut open the side of the cats, gut them then weld the side piece back in place and put in O2 sensor spacers to keep the check engine light off? Just need Here is the truck listing. The guy is offering it to me for $9500 is this a god buy or should I run?