tricepts are much easier than calves. anything that uses tris will make them grow, if you've been training for 4 years, how can they not be bigger?
different bench variation, rope pulldowns, weighed dips (arms strictly at sides, no flaring), L-seat, french press, cable tri pushdown, etc. you shouldn't have any problems with tris unless you're not eating enough. Or perhaps they just LOOK like they haven't grown?
As for calves, I really think it's just genetics... there's a million theories as to how to get it them to grow. do sprints, hop on one foot while holding a dumbell weigh, high rep (50+) calf workouts, heavy negatives (use both legs to raise weight, use only one leg to lower weight). all movements should utilize your full ROM, all the way up, pause, all the way down for a good stretch. same with tris and any other muscle for that fact...