Sealed boot

[Rushiel325]

Hi everyone
I have a 1990 325i, with a boot that is totally sealed - no ski flap, and a compression tank at the back of the boot.
Is it at all possible or advisable to run a sub in the boot without having to cut any metal and put any ports?
I am really keen on installing a sub, but really apprehensive about cutting any metal.
Thanks for any advice

[Mless5]

Hi everyone
I have a 1990 325i, with a boot that is totally sealed - no ski flap, and a compression tank at the back of the boot.
Is it at all possible or advisable to run a sub in the boot without having to cut any metal and put any ports?
I am really keen on installing a sub, but really apprehensive about cutting any metal.
Thanks for any advice

If you want to rattle your trunk and have 0 bass on the inside- go for it.

[Rushiel325]

So i'll get absolutely no bass? Have a ported box

[Mless5]

It will be loud in the trunk. I'd make a cut out where the armrest would have been and make a sealed box airtight against it.

[BMW2JZ]

I think you'll find that if you decide to make a cut out you will actually be able to just 'tap' out the ski hole section of steel as in the E30's I've seen it's only been held in place by a few tack/spot welds.

It's fairly easy to remove, but you will need to remove the rear seat base and back to gain access to this point. I'd suggest using a coal chisel if possible also. This will create the least damage to the panel.

[PiercedE30]

Wait, why do you have an air tank in your boot?

[Rushiel325]

Thanks for all the advise guys - but found out that that is abtually a 20 litre fuel tank at the back of my boot? There is a 55 litre on under the back seat and 20 litre one at the back of the boot.
Not sure if this is an international standard - my car is a South African e30 (not sure if they made it here back then).
So thats obviously something i can't remove...
People have also suggested drilling ports into the parcel shelf....

[Mless5]

Alpina used to makr these for e28, maybe they did for e30 and you have one of those?

[Rushiel325]

I think they did - because on the South African forums - they say that all right-hand drive 325i's have that extra tank at the back of the boot..
Thats going to be a huge problem for a sub :-(