Im most likey asking a stupid question here but will a 90-91 crx si door fit an 88 crx si? bc i have a 90 hf door and it doesnt fit so i was just wondering if the 90-91 si door would be any different

 

If you compare the door jambs you will find your answer.

I'll be nice - No.

 

is there a diffrence between 89 and 91? My buddy has a parts car crx thats an 89 si thats been in a barn for 20 years with mint interior and electric windows

 

Does you buddy wanna sell me his seats?

 

Only the 89 HF had pillar belts, so your buddy's car will work. You match the seatbelt type to determine fit.
OP, you need an 88 any trim or 89 HF only.

 

I was able to install 88-89 doors on my 90 crx. There was some minor modifications (slight use of a hammer) to make it fit so I suspect with just some minor modifications, you can make it work

it was very easy

 

Ok here goes.

We have been doing this on a hatch for autox.

we put my 89 civic si doors on a 91 civic si.

They fit. Have to take all the door bet crap out of the door jamb. Black plastic stuff.

We have read that you all different types of fixes.

Well we tried it.

It works. but you can not go the other way due to difference in the door jamb area.

As you close the door you can see the door area difference.

I have read that you have to cut out the door jamb area in the 90/91 and replace with 88/89.

I have also read that the doors will not fit.

I have also read that you can use the 90/91 molding on the 88/89 doors to get rid of the wind noise.

I can tell you for a fact that dealing with the hatch the 88/89 doors fit on the 90/91 body. Not sure on windnoise, since it is a race car. Lots of noise anyway.

I'll be trying it with my street car.

 

seats, tail lights, and most of the plastics are mine lol... Its so mint

 

the 90 91 doors are about 1/4 of an inch longer than the 88 89 doors. pain in the *** fitting a 91 door on my 88, but it works. leaks air like a mo fo on the freeway though