<p>Our friends at Tamiya did their customary good job designing their 1996 Porsche 911 GT1 kit. There's a lot of parts, as molded in black, white, silver, clear etc, its buildable without painting, or with some painting. But time is money and, as always happens, they stopped adding parts or representations of the actual car before exhausting the subject. 
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Besides electronics boxes in the cockpit, and hoses, tubes. cables and mechanical linkages in the engine compartment, the parts most obviously not present are the stock 911 unibody front sheeet metal ahead of the front wheels, the prominent ducting from the front  of the car to the front brtakes, and the plenum above the radiator that forces the 'trunk' lid vent to draw air from the radiator. That last one is the hardest part to find a good photo of and I"m still working on it. However, I have been able to get a fairly good composite view of the front sheetmetal and brake ducts and this drawing shows what they look ilke, in sketch form, and the shapes and sized of the pieces of flat plastic stock I used to make them. The associated photo shows the pieces of the brake duct "S" bend being snapped out and shaped, all the pieces taped together and shown in place, and all the pieces layed out flat to show what they look like.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/9998127@N06">Bill Abbott</a>
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/wbaiv/4331427421/">911 GT1 1996 missing model pieces</a>