I have an hx and wanted to do a swap to a y8, but what are the differences. I know the hx and ex have a 10 horse difference with different tranny's, ecu, etc. But I did not know the difference for the head. If anyone can please help me out on this one. Thanks

 

HX has roller rockers and two lobe cam (VTEC-e) the EX has a three lobe cam (VTEC). That is the only difference I am sure of. The ports may be slightly different. The valves are the same size.

 

you may want to look into spade's d series thread and the potential of the y5 head. It has those roller rockers which the y8 does not have and it has the potential to make big power.

 

can u give me a link to that thread
thanks guys

 

Spade's D Series thread...
https://honda-tech.com/zerothread?id=335078

 

its a great thread Also check out the d series boards on http://www.ezboard.com

 

the only bad thing about the HX is that it doesnt seem responsive to tuning for some reason...i was running I/H/E n some other stuff and was only pulling into the 16s with mine...

 

Thanks guys for the information. I decided on keeping my hx head and put a y8 mani and tb (both bored) that I found for sale.

Thanks again guys