It's a little tight, but very easily accomplished without pulling the cab. Get yourself a 10mm and a 13mm ratcheting flex wrench also. Makes the job lots easer if you have a set of those to work on a 6.0L. Pulled the turbo and cleaned it while doing this, but it's not absolutely necessary to do. Spray all the exhaust pipe bolts with penetrating oil as long beforehand as you can stand not driving your truck.