is the only difference the front bumper? i know the 92-93 is a more aggresive one, IMO. also will the 90-91 bumper fit on a 92-93? i ask b/c i want to get this body style integ and i also want the fake mugen kit from WW, but they say its only for 90-91. thanks.

 

90-91: non OBD ecu's, I think they have 10 less hp, "clear" turn signals in the back. No vtec option.
92-93: OBD, different front bumper, amber turn signals in rear.
that's all I can think of

 

the only other major thing i can think of is that there is different bumper supports between the two with the bumper........a swap is possible i know for a 92-93 on a 90-91 i dont know botu the other way around ..............check g2ic.com the other differences are little like the steering wheel is different and the backs have different emblems..........there is prolly more but i cant think of ny

 

Check this out...
https://honda-tech.com/zerothread?id=487268

 

bumpers are different stering wheel is different
90-91 the side miror's are black
92-93 the mirors were painted the same coler of the car
92-93 had 10 more hp due to the obd1 ecu and better cams
90 ls did not have power windows
thats all i can think of now