are the sun visors needed? do they hold up the headliner, or should it be alright if i put up my headliner back up without the sun visors?

 

The sunvisors certainly do assist. If you have the original stock headliner and if the clips are good on it (the ones above the rear view mirror), it will stay up. It might sag in certain areas. You could always use the visor mounts (the black triangle pieces) without the visors on them if you wanted to.

If you have the ABS headliner, I'd say go for the visors because there are no clips on that and it's basically held up by the visors in the front.

 

thanks for the info. it's the stcok headliner (i just got done re-doing it). i'll try it without the sun visors. thank you.