I always see the 06 si seats selling on ebay and I am trying to make my interior a little bit cleaner and more modern so I was wondering if they would fit front and back? Or does anyone know of any others?

 

The fronts don't fit with out serious modification/welding... The rears, well I wouldn't even know where to begin with the rears...

If you want really nice seats go with s2k or type r recaros, if you want ok go with the GSRs...

 

Do the s2k and the gsrs fit without modification?

 

The s2k seats require you to swap your current seat pans onto the s2k seats... It sounds daunting but it really isn't that bad... You get all of the comfort and performance of the s2k seats with oem fit (because you are re-using the civic rails and pans)... I have s2k seats and have write-ups saved so I can provide assistance if needed... They are the best seats you can put into these cars IMO

The GSR seats just require you to swap the inner rail... However, while they offer some comfort over stock the bolstering leaves something to be desired and they don't look all that more "modern" than the stock seats...