Tri-z head's 1's & 2's....

**Bryan Raffa** · 03-10-2010, 08:55 PM

just going through a few heads today gonna have a few done up... Must be blind but never noticed the 1 and 2 on top of the head before.. anyone know the difference? older / newer?

anyone check there bone stockers Z's for me and let me know if ones a 85 or a 86...

**code200k** · 03-10-2010, 08:59 PM

huh im going to have to look at my head. wonder if it has anything to do with the 85/85.5 switch?

**denn** · 03-11-2010, 12:13 PM

You hit it on the head. One is 85 and the other is 86. I think that the number 1 is 86, I cant remember. Dont think there is any difference though. If you ever noticed on the 86 cylinder the part number prefix 38W has a 01 next to it. It looks as 38W01. Check it out. The 86 cylinder has revised porting, I know that.

**Racerguy381** · 03-11-2010, 01:54 PM

Hey Raffa I still have that cylinder waiting for you.

**03 ORANGE SHEE** · 03-11-2010, 10:26 PM

i got both, there the same

**Bryan Raffa** · 03-12-2010, 07:45 AM

Ya ,, I know how to spot the 86 cylinders , just never noticed the numbers on the heads... Hey Nathen.. they wont be the same when I'm done... Racerguy ... Dam ,,I forgot about that!

**Racerguy381** · 03-12-2010, 01:49 PM

PM me and I can give you my paypal info again.

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Tri-z head's 1's & 2's....