What are these holes on lower intake??

[White5.0]

i was installing fuel injectors and rail earlier and saw two holes in the back of the lower intake manifold and dont know what they are for? i found a pic online of a lower intake and circled what i am talking about in yellow. in this pic, the holes are filled, mine do not have anything in them....what are they for??? one side looks like a hose plugs into it or something??

Intake%20lower%20top%20view[1].jpg

[97LaserRed]

For coolant? That be my guess.

[Rodeheaver's]

the top one is for the throttle body heater that most people take off, and the lower one is just a plug, but they are both into coolant passages, and man is that intake ported or what...

[silver03tt]

the top one is for the throttle body heater that most people take off, and the lower one is just a plug, but they are both into coolant passages, and man is that intake ported or what...

Yeah, I would say. It looks like they had to do a little welding where they got a little crazy. It looks like it should flow.

[White5.0]

the top one is for the throttle body heater that most people take off, and the lower one is just a plug, but they are both into coolant passages, and man is that intake ported or what...

so can i just plug both of these with bolts and ill be good to go?

[349Stroker]

yea plug them both

[White5.0]

thanks for the help guys

[juice_man_86]

They welded those runners so they can port the runners straighter. Tmoss does this sort of thing all the time to stock style intakes