The car is an 89 Civic si with the stock D16A6 engine.

Can anyone tell me the differences between it and the SOHC ZC engine? What I'm wondering is if I can put the ZC in and still be SCCA It and NASA H4 legal?

Thanks

Ron

 

Bump cause someone else might know.

 

same thing has an a6 with just a slightly more agressive cam thats it nothin special about it