help w/ box please! (pic)

[robertoyoung08 10+ year member]

Making a custom box for my 05 GS Lexus. It's not too custom. Just a port on top of the box so it can fire upward through a whole where my stock sub is. and at the bottom because where i will place the box in the trunk isnt completely flat. its like a sidewalk i guess you could say, it has a "drop".

well heres a pic at the bottom i drew up with paint, hope someone can help out. im trying to figure out the numbers for the final tunning of the box. since its not a regular rectangular box, im having trouble figuring it out. any help? im going to use an aero port, so i need some help finding the size (height and with) of the aero port

heres a pic of my trunk so u guys can see what im trying to work with.

and also a picture of the box im trying to put together along with the measurements.

id appreciate any help, im having rouble figuring out the math for turnning and cubic feet of the box! thanks a lot!!

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[RuinedAng3l 10+ year member]

6.74 ft^3 is your boxes total volume. Hopefully someone can help you with tuning....

 

[dappa5 10+ year member]

hit me up i'll help you