Semi hatchback?

Hi guys, i need some advice before i do anything. i'm thinking about to cut a big hole like the red rectangle lines in my reardeck of my car as shown in the pictures below making it looks like an Semi Hatchback, i want to know if i should do it, or not? what will be de pros and cons of doing it? will it help a lot with the bass or not? curently i already have cut 4 holes, 3 big and 1 small as you can see in the pictures and it did help a lot. so what you guys think about it? thanks. Shaking The Neighborhood

The extruded sheet metal in that area, as much as it doesn't seem like much, actually is part of the structural engineering of the car and provides stability.  I wouldn't cut that shelf out of any car, my own or someone else's.  A hatchback is engineered to be stable without the rear parcel shelf.  In my personal car, I used the center sub cutout already provided in the manufacturing as the pass-thru. Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

Don't cut any metal out. You will destroy your car. That metal is critical to holding the vehicle together and providing reinforcement to the roof, rear window and rear end of the car. If you did cut it out, the next time someone put your car on a hoist you would probably blow out the back window or worse. I have already seen this happen to someone who cut the rear deck out of a Mustang. Hoisting the car cause enough flex in the vehicle that the car was written off. It would have cost more to fix it than it was worth.   A much better idea would be to redesign your sub system so that the output from the subs is forced into the area behind the rear seat pass through in the middle of the seat. If this area in the trunk is sealed off from the rest of the trunk and the subs fire into it, all the bass output will come into the interior of the car and not be lost into the trunk. I have done this to my own car and many others and love the results.sparky

If it were me, I would take the saw to it. Then I would make a entirely new 1/4 or 1/2" steel cage to carry the load from shock tower to shock tower. Next would be a nice 1/4" or 1/2" steel flange all the way around the opening and make sure that it bolts to the new metal support. I would also anchor it down to the rear seatbelt mounts in the center of the rear seat bottom. Then and only then can you cut out the back shelf to keep it from folding up like an accordian.Top Secret, I can tell you but then my wife will kill me.

thanks guys for answer me, yes forbidden i tought about that to, to reinforce it with a steelframe and some weldings. i will let some mechanics see it and see what can be done. anyways, thanks again.Shaking The Neighborhood