Header question
09-09-2003, 08:54 PM
#1
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Join Date: May 2003
Location: Phoenix Region (Used to be Milwuakee)
Posts: 106
Header question
I know this sounds pretty stupid of me, but how can I tell if I have square ports or round ones without taking the manifold off? I was thinking of getting a set of headers, since they seem to be going for fairly cheap.
09-10-2003, 05:51 AM
#2
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Join Date: Apr 2002
Location: Waukesha, WI
Posts: 236
The easiest way is to look at the casting number, which is on the other side of the head towards the front. As far as I know the square port heads are E31, E88, N42, and P90 (turbo). The N47 head has the round ports, and the P79 (ZX) head is diamond shaped.
Phil
Phil
09-11-2003, 07:59 AM
#3
The Evil Twin
Join Date: Mar 2001
Location: Seattle, WA
Posts: 9,294
P79 diamond? I've never heard of that before. I think the P79 is lumped along with the round port heads. Maybe their exhaust runners are a slightly different design than the N47... but so far you're the first to mention it. 
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