Anyone make an aluminum expansion tank?

[ChicagoE38]

This is not the first time I have replace the radiator expansion tank.

In fact, it failed at the same place, the horizontal seam between the top and bottom halves.

Is the 740 tank the same as the 750?

Is there an aftermarket aluminum tank available?

Thanks in advance!

[Bimmerhead]

VAC Motorsports can get you an all aluminum E38 radiator. The guy to ask is Tony.

[99bmw740il]

think about it- $120 for crappy bmw radiator, or +$750 for an aluminum radiator.......???

(im guessing 750 because thats how much a new radiator was for my truck)