have a 1990 RT4WD
head is stamped pm3-17.
is that the stock head or what is it from? cant find much on it?

 

anyone?

 

The search function can be your best friend...

https://honda-tech.com/forums/tech-misc-15/d-series-head-codes-786093/

Although it doesnt say what your head is, Im assuming its a 1.5l head from a d15b dpfi.

 

idk dude but now u got me curious ill do sum research and tell u if i find anything

 

ok cool, hopefully you can find something out.

 

I hate to break it to you but all of the DX and Si heads are the same (minus the 8-valve head). Actually it has the same part number from 1988-1995 non Vtec. Some of the JDM heads came with carbs and when they were sold in the USA as JDM replacements they had to have a blockoff plate installed by the distributor. Performance wise they are all the same.