What Holley heads do I have?

Shadrack

New Member

Aug 2, 2005

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Dec 5, 2005

#1

• Dec 5, 2005

• #1

I've been trying to find out what heads I have on my car. The only numbers I can see are on the front of the drivers side head. The number reads..... 12157...... does anyone have a clue what model/size these heads are? Where can I find the serial number (or is that the serial number)?

Any help would be appreciated.
Thanks!

 

8

86bluecobra

Advanced Member

Dec 20, 2004

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B.C. Canada

Dec 6, 2005

#2

• Dec 6, 2005

• #2

when did you buy the heads? They only make 1 set of heads now it looks like for the fords a 2.02 1.6 valve ones. I have holley systemax II heads from 5 years ago they were 1.94 1.6 valves. http://users.erols.com/srweiss/tablehdc.htm#Ford scroll down to windsor then down to holley systemaxthose are the flow numbers for the 1.94 intake valve heads

 

Shadrack

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Aug 2, 2005

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Dec 6, 2005

#3

• Dec 6, 2005

• #3

I bought the car with the heads already on it. I think they are the Systemax heads, not the Systemax II heads.

 

Rick 91GT

Mustang Master

Nov 29, 1999

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Dec 6, 2005

#4

• Dec 6, 2005

• #4

Do they have stud or ped mount rockers?

 

Shadrack

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Aug 2, 2005

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#5

• Dec 6, 2005

• #5

View attachment 495348

 

Rick 91GT

Mustang Master

Nov 29, 1999

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Dec 7, 2005

#6

• Dec 7, 2005

• #6

Stud mount...

They are most likely the new series head, which are very good and respond well to some porting. Biggest I have is the cheap locks they use.

The best way to confirm would be measuring the valves. Holley only makes 2 stud mount heads, 300-573 and a 300-575 they have different size intake valves. You could call Holley Tech, although I find them hit or miss at times. They will need the numbers that are cast on the head inbetween the rockers like you have pictured.
I ran the 300-575 and they are a really nice head, and if I remember correctly it had 12157 on the front. I am trying to find my old pics

 

Busted07

I need my gorilla to be about an inch longer.

Nov 15, 2005

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Dec 7, 2005

#7

• Dec 7, 2005

• #7

Shadrack said:

View attachment 495271

Click to expand...

do you have any other pictures of your engine bay? im trying to decide how to route some things, and i like how yours looks from that picture