definatley thinner metal if its aftermarkey. also if your truck is totally stock,never modified, there might be a hearty dose of undercoat. there was penty of that on my truck. preserved most of the metal


2000 Nissan Frontier, 3.3L (sold)
2006 Chevy Cobalt SS, 2.4L
1952 Chevy 1/2 pickup, 235 c.i. I6
when life speeds up, downshift