Good Mass Builder????

So i modified this a bit and want to get everyones opinon and if this/ along with a good diet (5000 cals+300grams protein (clean diet) would be a good lean mass building routine.

Day 1 - Legs
Leg Extension 3 sets 12-10-8 reps
Squat 3 sets 12-10-8 reps
Lunges (Barbell or Dumbbell) 3 sets 10-12 reps
Leg Curl 3 sets 12-10-8 reps
Standing calf raises 12-10-8 reps

Day 2 - Shoulders
Seated Side Laterals 3 sets 10 reps (i have bad shoulders :-( )
Military Press (Barbell or Dumbbell) 12-10-8 reps
Rear Delts 3 sets 12-10-8 reps
Front Raises (Barbell or Dumbbell) 3 sets 10 reps
Shrugs (plate loaded) 3 sets 12-10-8 reps

Day 3 - Back
Hyperextension 3 sets 12-10-8 reps
Partial Deadlift 3 sets 12-10-8 reps
Pull ups 3 sets 10 reps+
T-Bar Row 3 sets 12-10-8 reps

2 Days off (cardio/ ab work)

Day 4 - Arms
Straps Pulldown 3 sets 12-10-8 reps
Skullcrusher 3 sets 6-12 reps
Curls (Barbell or Dumbbell) 3 sets 12-10-8 reps
Preacher curls (Barbell or Dumbbell) 3 sets 12-10-8 reps

Day 5 - Chest
Incline Flyes 3 sets 12-10-10 reps
Incline Press (Barbell or Dumbbell) 3 sets 12-10-10 reps
Flat Bench (Barbell or Dumbbell) 3 sets 12-10-10 reps
Dips 3 sets 6-12 reps

looks alright to me but i would do the hyperextentions last on back day. i couldnt take my spinal erectors to failure and then do any kind of heavy rows. also might want to occasionally throw bent barbell rows into your back workout.

I would throw in an extra rowing exercise on back day. Also thats alot for shoulders, I would just throw in some laterals or military press on chest day.