Will 450cc mod+ sub muscle silicone implants help me achieve D cup?

At size 36 B each 200 cc’s of implant corresponds to 1 cup
size change. 400 cc implants would take
you up to size D. I always recommend
small round textured silicone gel implants placed retro-pectoral since they
look and feel more natural, are more stable, less likely to ripple or have
complications needing revision. Implant
profile is irrelevant in the retro-pectoral position since the muscle
compresses it. In your photograph, your
breasts are slightly lower than optimal.
For that reason, I recommend a circumareola approach to lift your
breasts and correct the asymmetries in the position of your areolas. Since your breasts are different sizes, you
will need different size implants.Best Wishes,Gary Horndeski, M.D.

I specifically never promise patients a certain cup size
because all brand’s differ on what is considered a “D cup,” etc.In addition, just because you are getting
450cc implants, this is not enough information alone to determine what size you
will be post-op. It also depends on how much breast tissue you have initially,
and it seems you have somewhat large breasts to begin with.You very well could end up being larger than
a D cup with 450cc implants.My advice
is that it is best to discuss your goals and desired outcomes with a board
certified plastic surgeon and focus on the desired look you are trying to
achieve and do not focus on a certain cup size.

Discussing your goals (or evaluating the outcome of) for breast augmentation surgery in reference to specific cup sizes is NOT a good idea and can be a source of miscommunication. 
Generally speaking, the best online advice I can give to ladies who are considering breast augmentation surgery ( regarding breast implant size/profile selection) is:

1. Concentrate on choosing your plastic surgeon carefully.  Concentrate on appropriate training, certification, and the ability of the plastic surgeon to achieve the results you're looking for. Ask to see lots of examples of his/her work.
2. Have a full discussion and communication regarding your desired goals  with your plastic surgeon. This communication will be critical in determining  breast implant size/type/profile will most likely help achieve your goals. 
In my practice, the use of photographs of “goal” pictures (and breasts that are too big or too small) is very helpful. I have found that the use of words such as   “natural”  or “C or D cup”  etc means different things to different people and therefore prove unhelpful.
 Also, as you know, cup size varies depending on him who makes the bra; therefore, discussing desired cup  size may also be inaccurate. The use of computer imaging may be helpful during this communication process.

3.  Once you feel you have communicated your goals clearly,  allow your plastic surgeon to use his/her years of experience/judgment to choose the breast implant size/profile that will best meet your goals.  Again, in my practice, this decision is usually made during surgery.
I hope this (and the attached link) help.