LT1 3 inch MAF Identification

[joed]

I'm hoping someone can help me identify these apparently identical LT1 MAF's. I got the both used, and I was told by both sellers they were thought to be GM or Delco. However, I don't see any markings along those lines. I just found it weird that I got the identical unit from 2 totally separate board members around 6 months apart. I hope that's a good sign that they are at least good quality, if not GM or Delco parts. Any help appreciated.

 

[edfiero1]

They look just like the one in my 96 Impala.

 

[mikestertwo]

Those are GM MAFs made by Delphi

 

[joed]

Great news. Thank you edfiero1 and mikestertwo! I appreciate the help.

 

[edfiero1]

Impala guys take out the screen for more airflow.... but it is hotly debated on if this is a good idea or not.

 

[earlbrown]

Those are both GM units. You can tell by the sticker (and crappy alum casting).

On the screens, feel free to pop them out if you want to. It probably won't help, but it won't hurt either.


Note: that advice DOES NOT apply to stock type horizontal film type sensors. You pop the screens off those, and output goes all to hell.

 

[Pronto]

Here's the skinny

 

[earlbrown]

I think the OP was worried they were Chinese versions of GM units.

 

[RmvBfrFlght]

The hot stamp values are helpful in ID'ing MAF sensors:

RemoveBeforeFlight