Spray it with penetrating oil at least a few hours before, I did the day before. Use a 6 pt wrench or 6 point socket if you have room. I was laying on the engine with an arm around each side of the turbo, put the wrench in and got it seated with my left arm on passenger side, then did the grunt work with my right hand stuffed through a small space on the driver's side. Done it twice this way, first time used a wrench, second time used a socket, either way be sure it's a 6-point so you don't round off the bolt head.