factory sohc throttle body mod?

[stangman82]

I was checking to make sure that the throttle blade opened fully on my '00 sohc x today. i noticed that there were like teeth in the bottom of the throttle body. I have never seen this before......

My question is, what purpose do they serve? I would assume that if there is not a great reason for them that there is alot of airflow restriction here.

Anyone ground them out on their tb?

 

[petetheengineer]

if im right that is the plate that ford released as a TSB to reduce noise level under bonnet. Some have and some dont. It does not restrict flow it just breaks up the flow.

thank

 

[XLT]

Some people have ground of the little fins and had good results i guess.

 

[LancerEVA06]

they're actually there to swirl the air for the EGR system. Since the EGR tube is directly behind the TB in the IM.