Fallout 2 implants

The plans to combat implant can be found in Vault 8 of Vault City with the quest Gain combat implants. The two can be improved once but, given the scars left, the player loses 1 in Charisma.

Dermal impact armor
Combat armor plates are grafted to the patient's skeleton, constituting a level one combat implant that grants you an additional 5% resistance against normal and explosive attacks. The operation costs you a suit of combat armor, two days of life and:
 * Redding: $5000
 * San Francisco: $5500
 * Vault City: $7000 (discount to $5000 with CH 6 or Barter 75%)

The implant can be upgraded to a level 2 (Dermal Impact Assault Enhancement) for another 5% resistance with another suit of Combat Armor, 5 days and a permanent loss of one Charisma point. Costs:
 * Redding: $30,000
 * San Francisco: $33,000
 * Vault City: $40,000 (discount to $30,000 with CH 6 or Barter 75%)

Phoenix armor implants
Thermal and energy dissipative membranes are stripped from a suit of combat armor and surgically implanted into the patient. The implant grants 5% additional resistance against plasma, laser and fire weapons. It costs a suit of combat armor, three days of your life and:
 * Redding: $8000
 * San Francisco: $8500
 * Vault city: $10,000 (discount to $8000 with CH 6 or Barter 75%)

Like the dermal impact armor, it can also be upgraded with an assault enhancement, granting another 5% additional resistance against plasma, laser and fire weapons. It costs a suit of combat armor, six days in Redding and Vault City or four in San Francisco, permanent loss of one Charisma point and:
 * Redding: $49,000
 * San Francisco: $49,000
 * Vault City: $50,000 (discount to $40,000 with CH 6 or Barter 75%)