Took me 6 hours, and I've done it before. Drain coolant, disconnect oil and water fittings, disconnect downpipe, disconnect intake, disconnect hot pipe, unbolt manifold, remove oil/water tubing, pry off and unbolt turbo/mani bolts and holders, unbolt O2 housing, unbolt intake elbow. Now its out! Assembly isn't any faster either. The oil/water fittings to the block can suck, too. Don't forget about the new exhaust manifold gasket! I suggest Mr Gasket full copper for 93 Sentra SE-R.