ok i have ran into a predicament, i have a custom built sub box with 2 12" type Rs and they are facing inwards toward the box (u can see in my photos) and it puting alota weight behind the axle either way in or out the speakers are being over or close to the axle........but to the point the car handles fine with them in there but the front is about 2 to 2.25 higher, plus my camber is terrible in the rear due to the sag. would i be being a retard it i just lowered the front and cambered everything but left the rear stock springs but lowered from the weight ???,,....or does anybody have any suggestions as to a harder spring for the rear ???

 

I don't know exactly how much bass you want.... but a good single 10" sub w/ a good amp should give you all you really need.

It's been a long time since I've done SPL competitions. - But I'd assume the RX8 is not a great car for SPL comp.

 

coilovers
unmatched springs sound pretty stupid to me
two 12s must be deafening in a small car like the 8. I've heard a single 10 and even that is almost too much

 

I would recommend coilovers since you can adjust them to balance out the weight. (I have 2 12's and a full setup in my trunk as well and currently run springs, but that's going to change in a few months)

 

any suggestions on adjustable coil overs