I thought it was more of a NVH item. My 2001 ZX3 didn't have hood insulation (it was phased out mid 2001), and after 30,000 miles, its still fine.
2003 Ford Focus ZX3 2.3l N/A = 221 HP, 162 ft-lbs, email@example.comMPH - SOLD
2006 Ford Fusion 2.3l Turbo = 244HP, 247ft-lbs
2016 Ford Fusion Hybrid