box size?

[mylows10 5,000+ posts]

should do a external port firing forward into the cabin .can do 14" x 14" x 26" 45's in all corners with a large 45 or whammy behind the port

 

[rdlyn13000 10+ year member]

Woofer facing back, port into car?

and not sure what you mean by large 45 or wammy behind port

 

[mylows10 5,000+ posts]

woofer forward and port forward ,external .the trick is to direct the air flow from the back side of the woofer in to the port .45's are just angles inside the box to do this and a whammy is a larger version of a 45.

like these