they use plastic or fiber as the material of custom door panel right?
rm450 for me is kinda expensive....

actually i wanna install 6.5" speaker too but my ori. stock is only 4" or 5" ...
however, other than custom door panel.. , there's another way is by cutting your ori door panel.. only if you willing to do so..
but no harm right? since you gonna stay at 6.5" forever..