I found the most weight that could be removed from the Konig while still being drivable.

I removed and weighed each individual part. Then I installed it and put in one bolt at a time till it would not fall out. I then compared the OEM and aftermarket parts. Any parts not mentioned should be assumed they are the same weight as OEM, or OEM is lighter.

Default shock 14x4
Coilovers 10x4
-16 Kg
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Front A Arms
Default 8x2
Adjustable 5x2
-6 Kg
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Engine
Default 220x1
Performance 180x1
-40 Kg
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Intake
Default 16x1
Turbo 10x1
(Performance is also 10 Kg)
-6 Kg
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Exhaust Manifold
Default 22x1
Turbo 45x1
+23 Kg
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Intercooler 10x1
Bolts 1x2
+12 Kg
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Intake Manifold Bolt
-1 Kg (Due to turbo intake)
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Engine Mount Bolt
-1 Kg (Only need 3 I guess lol)
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ABS Module
Module 7x1
Bolt 1x1
-8 Kg (Deleted)
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Transmission
Bolts 1x3
-3 Kg (Auto and Manual same weight, but does not need all bolts)
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Rear Dif
Bolts 1x3
-3 Kg (Open and LSD are the same weight, can lose three bolts)
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Rear Suspension (Shocks Already Accounted)
Bolts 1x4
-4 Kg (Not Required)
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Wheel Bolts
Bolts 1x8
-8 Kg (Each wheel only requires 3 bolts)
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Doors L+R
Doors 75x2
Bolts 1x4
-154 Kg (Delete)
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Trunk
Trunk 40x1
Bolts 1x4
-44 Kg (Delete)
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Hood
30x1
-30 Kg (Delete)
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Seats
Default 35x2
Bolts 1x8
Sport Seat 20x1
Bolts 1x3
-55 Kg (Delete + Sport + Three bolts total)
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Steering Wheel
Default 8x1
Grinding Disc 1x1
-7 Kg
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Shifter
OEM 2x1
Carbon 1x1
-1 Kg
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Nitrous
Mount 5x1
Bolts 1x2
Tank 11x1 (Enough capacity for one race. Can go to 14 Kg)
+18 Kg
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Exhaust
Pipe 30x1
Muffler 12x1
Bolts 1x6
-48 (All Deleted)

(Turbo + NOS) = -371 Kg of removed weight.
(Turbo) = -389 Kg of removed weight.
(Lightest Possbile) = -451 Kg of removed weight.