I went with Banks. It is BIG and completely replaces the factory plumbing off the turbo. It is a very heavy casting and works very well. A great side effect was the exhaust noise from under the passenger side floor board is gone. It also cycles when started cold. Got for $850 complete with smart lock for trans. Look around and check for sales at banks, can get good pricing if you look. The noise reduction in the cab is very noticeable, wife noticed first time after installing. She usually dosen't notice any changes.