calgary_z28

Since sub frame connectors didn't come stock on 4th gens, why did GM have those two pre drilled holes on each side of the under body (front of the car) for them to bolt into? What were these holes originally intended for?

ULTIMATEORANGESS

iTrader: (4)

good question. who can help us?

JD_AMG

There are three holes up front per side, you'll see these kind of holes all around the unibody. I think its probably drain holes so water doesn't get stuck and rust out everything.
holes in rear:

holes in front with sfc bolt bracket installed:

calgary_z28

^Makes sense to have drain holes. I wonder why they would have threaded them though? Surely the bean counters had a reason!

MasterTomos

iTrader: (15)

They aren't threaded factory. That picture has the SFC plate in it

calgary_z28

Ah right..now that makes much more sense. Thanks!

_JB_

iTrader: (33)

I'm sure some were used on the assembly line.