time will tell, what will and wont work, i have all the speakers and amplification that i need to do whatever i have to do. i can fit a 5,25" midbass on either side of the dash to go with the 4" and tweeter in the pillar but it will create a serious timing issue that wouldnt be a big deal for 1 seat judging but will create havoc with 2 seats, they way it will be judged. this new system is being built stricly to compete and improve on my 5th place at finals from '04, deconstruction begins in less tha 3 hours