The Catco will go where the stock cat goes, the shop that does the install wil have to do a little work w/ the mount to the exhaust manifld and reroute the EGR tubing where it meets the Cat, but it is pretty straight forward stuff. Also I don't remember the exact figure, but there is a mileage standard for how many miles a car must have before the Cat can be replaced, I think its 60K, buy not sure.
