Originally Posted by mikeym
im looking to put a h&s tuner in my 08. my understanding is that no modifications need to be done to the factory exhaust for it to run properly, as it can "turn off" the sensors in the factory exhaust. my concern though is the factory exhaust to restrictive to run a 250hp file? will temps get out of control? i dont have any desire to squeeze every last horsepower out of the motor, make it loud or spend a bunch of money on a full turbo back exhaust. what are my options here? is an intake going to be required also? i read of filter minders in the factory housing coming apart under boost. thanks.
Yes, the H&S unit will keep the sensors happy, but you will need to remove the DPF in order to run the race files. You can run the regular files with the stock exhaust, but you are going to be limited to 120 HP. If you want to run the race files, I highly suggest getting a DPF/Cat delete setup at the very least. A full down pipe back exhaust isnt absolutely necessary, but it will do a better job of lowering EGTs. As far as an intake goes, I always recommend them with a delete kit. You can get by without one, but they definitely help with throttle response as well as overall efficiency. If you have any questions, feel free to give me a holler.