Air filter question ?

quik9r

Well Known Member
Supporting Member 3
GM air filter OD is 10.5"
NAPA air filter OD is 11 1/4"

Both share the same ID and fit inside the factory 380HP lid and base

Is there a difference in the air flow coming in?

Random question by I was busy cleaning in garage.
 

Attachments

  • IMG_20200322_141641.jpg
    IMG_20200322_141641.jpg
    76.5 KB · Views: 16
  • IMG_20200322_141726.jpg
    IMG_20200322_141726.jpg
    72 KB · Views: 16

MRHP

 
Supporting Member 1
What was the Napa filters original application? You may be able to contact the supplier of the filter for cfm rating.
 

quik9r

Well Known Member
Supporting Member 3
What was the Napa filters original application? You may be able to contact the supplier of the filter for cfm rating.

The NAPA was the number for 409 HIPO single carb. I have had it since 1995. I was thinking the original with smaller OD sat back from the snorkel entrance into the body and may create "less turbulence."
 
Last edited:
Top