Complex sentence: The final round of green flag pit stops began on lap 325 when Kevin Harvick gave up the lead to pit and gave it to Kyle Busch, who pitted on lap 329 and gave the lead to Clint Bowyer.
Split into simpler sentences: The final round of green flag pit stops began on lap 325 when Kevin Harvick gave up the lead to pit and handed it to Kyle Busch. He pitted on lap 329 and gave the lead to Clint Bowyer.