Ah, then I believe jlicrx is right... It is probably an STD instead of a DX... Those are the only ones that came with the 4 speed standard stock... That or someone swapped the 5 speed for the 4 speed (which I cant see someone doing)... I f its an STD, its got 70 HP like stated... The STDs and their engines are a mysterious breed... Some ppl and sites say they are 8 valves, some say 16, Honda parts sites list them as 16... Your valve cover does say 16, so Im sure yours is 16 valves... Id really like to know for sure tho, if they came with both 8 and 16 or just one or the other...