Differences between PR3-3 head and PR3-4 head????
 

Sorry I searched but could not find anything. I need to know what car the PR3-4 head came off of.

My car was bought brand new and has the PR3-3 head while my cousin, who got his used has a pr3-4 head. This can't be right.

Let me know what's up. Sorry for the newbie question. https://honda-tech.com/forums/images/smilies/emthup.gif

Re: Differences between PR3-3 head and PR3-4 head???? (jdmspoonitr)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmspoonitr &raquo;</TD></TR><TR><TD CLASS="quote">My car was bought brand new and has the PR3-3 head while my cousin, who got his used has a pr3-4 head. This can't be right.</TD></TR></TABLE>

I remember sgT saying something about this some time back, essentially that both/either of those castings were used for ITR heads.

The important part is most likely the "PR3", where the -3 or -4 might just be that one is older than the other (for instance).

Re: Differences between PR3-3 head and PR3-4 head???? (zygspeed)
 

they are both head castings for the ITR

Re: Differences between PR3-3 head and PR3-4 head???? (jdmspoonitr)
 

i believe the pr3-4 is jdm b16a ...
thats what mine says when i bought the head

Re: Differences between PR3-3 head and PR3-4 head???? (badblackhatch)
 

PR3 is the head ID #. The folowing number, either 1 - 4, is from what casting it came from. I've seen ITR heads have every number, 1 - 4, and many different b16 years have different #'s following the ID #...example, my b17a head was PR3-2, my '92 JDM Xsi B16 head is PR3-1, my '00 JDM ITR head is PR3-4, my '97 USDM ITR head is PR3-1.

...There is no way to tell from the ID # and casting # which model/year/make the head came from. The only sure fire way to determine if the head is actually an ITR head is the green paint behind the distributor, which is the paint they slab on there in the factory when they select the best looking ones to go out for machining, and the minor portwork on the intake ports, and larger intake valves.

Re: Differences between PR3-3 head and PR3-4 head???? (92TypeR)
 

just out of curiosity, where is the "pr3-3" or "pr3-4" stamped?

Re: Differences between PR3-3 head and PR3-4 head???? (kepani)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kepani &raquo;</TD></TR><TR><TD CLASS="quote">just out of curiosity, where is the "pr3-3" or "pr3-4" stamped?</TD></TR></TABLE>

Look on the head, where the header bolts up. if you still have the stock header/heatsheild, it wont be clearly visably..you'll have to look in thru the sheild...also its near..between cyln 1 and 2.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92TypeR &raquo;</TD></TR><TR><TD CLASS="quote">PR3 is the head ID #. The folowing number, either 1 - 4, is from what casting it came from. I've seen ITR heads have every number, 1 - 4, and many different b16 years have different #'s following the ID #...example, my b17a head was PR3-2, my '92 JDM Xsi B16 head is PR3-1, my '00 JDM ITR head is PR3-4, my '97 USDM ITR head is PR3-1.

...There is no way to tell from the ID # and casting # which model/year/make the head came from. The only sure fire way to determine if the head is actually an ITR head is the green paint behind the distributor, which is the paint they slab on there in the factory when they select the best looking ones to go out for machining, and the minor portwork on the intake ports, and larger intake valves.</TD></TR></TABLE>

Agreed..very nice explaination https://honda-tech.com/forums/images/smilies/emthup.gif

Re: Differences between PR3-3 head and PR3-4 head???? (92TypeR)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92TypeR &raquo;</TD></TR><TR><TD CLASS="quote">The only sure fire way to determine if the head is actually an ITR head is the green paint behind the distributor, which is the paint they slab on there in the factory when they select the best looking ones to go out for machining, and the minor portwork on the intake ports, and larger intake valves.</TD></TR></TABLE>

Nice bit of info - cheers https://honda-tech.com/forums/images/smilies/emthup.gif https://honda-tech.com/forums/images/smilies/emthup.gif

Re: Differences between PR3-3 head and PR3-4 head???? (5thgen4dr)
 

Well, since it was brought from the dead I will try and keep it on topic. I remember a few years ago I posted a thread where you see a STAR in the head.

http://www.texasimports.org/Migspics/WTF.jpg

Re: Differences between PR3-3 head and PR3-4 head???? (migs)
 

PR3-2 JDM B16
PR3-4 USDM C5 and USDM B16A2

Re: Differences between PR3-3 head and PR3-4 head???? (Hooch'n)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hooch’n &raquo;</TD></TR><TR><TD CLASS="quote">PR3-2 JDM B16
PR3-4 USDM C5 and USDM B16A2</TD></TR></TABLE>

Well, the head you see in that picture is an ITR head. So PR3-2 JDM B16/USDM ITR

Re: Differences between PR3-3 head and PR3-4 head???? (Hooch'n)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hooch’n &raquo;</TD></TR><TR><TD CLASS="quote">PR3-2 JDM B16
PR3-4 USDM C5 and USDM B16A2</TD></TR></TABLE>

PR3-1: B16a, B17a, B16b, ITR
PR3-2: B16a, B17a, B16b, ITR
PR3-3: B16a, B17a, B16b, ITR
PR3-4: B16a, B17a, B16b, ITR

Re: Differences between PR3-3 head and PR3-4 head???? (92TypeR)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92TypeR &raquo;</TD></TR><TR><TD CLASS="quote">

PR3-1: B16a, B17a, B16b, ITR
PR3-2: B16a, B17a, B16b, ITR
PR3-3: B16a, B17a, B16b, ITR
PR3-4: B16a, B17a, B16b, ITR
</TD></TR></TABLE>HAHAHA

Re: Differences between PR3-3 head and PR3-4 head???? (ChopSuey)
 

thanks for all the useful information every one! Helped me figure out if my head was truly ITR!!

Re: Differences between PR3-3 head and PR3-4 head???? (5thgen4dr)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 5thgen4dr &raquo;</TD></TR><TR><TD CLASS="quote">thanks for all the useful information every one! Helped me figure out if my head was truly ITR!!</TD></TR></TABLE>


My info comes from my own cars.....not sure about the other info.

Re: Differences between PR3-3 head and PR3-4 head???? (Hooch'n)
 

https://honda-tech.com/forums/images/smilies/emthup.gif

Re: Differences between PR3-3 head and PR3-4 head???? (B_KeepeR)
 

green paint can someone take a picture of how that looks like?

green is green.

Re: (jzak1)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jzak1 &raquo;</TD></TR><TR><TD CLASS="quote">green is green. </TD></TR></TABLE>

kinda hard to miss lol

Now, Whats with the Star on top of the PR3 stamp?? Thats the first time I seen it.

Re: (ITR#132)
 

i noticed the bolts that mount the header are different between

PR3-2 male
pr3-4 female


Except the bottom end bolts on left and right.

just an idea

Re: (Hooch'n)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hooch’n &raquo;</TD></TR><TR><TD CLASS="quote">i noticed the bolts that mount the header are different between

PR3-2 male
pr3-4 female


Except the bottom end bolts on left and right.

just an idea</TD></TR></TABLE>

Buddy... what the hell are you smoking these days??? pass it along...

Somewhere around 97, honda switched from using all studs on the exhaust side of the head, to using only 2 studs... both lower corners of the flange. Not related to the PR3-X identifier on the head.

male/female... WTF????

Re: (Hooch'n)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hooch’n &raquo;</TD></TR><TR><TD CLASS="quote">i noticed the bolts that mount the header are different between

PR3-2 male
pr3-4 female

Except the bottom end bolts on left and right.

just an idea</TD></TR></TABLE>

joo in the chips'n'salza mode aren't you? https://honda-tech.com/forums/images...s/emsmilep.gif

Re: (Chris N)
 

firday biatch......https://honda-tech.com/forums/images/smilies/embeer.gif's deep





Modified by Hooch'n at 5:07 PM 12/8/2006

Re: (Hooch'n)
 

back from the dead again and yes i agree, green is green, but can anyone supply a picture of what it looks like?

this is what my head looks like -pause- https://honda-tech.com/forums/images...s/emsmilep.gif and it supposedly an ITR Head too....
http://www.we-todd-did-racing.com/fi...8Medium%29.JPG
http://www.we-todd-did-racing.com/fi...8Medium%29.JPG